If it weighs under 2,500 lbs, has a CdA of under .4 m^2, and has at least 200 horsepower, I'd be interested. Were it mid-pack placement with vector-controlled all-wheel drive, I'd be very interested. Make that 1,000 horsepower or something close to it, I become extremely interested. Today's auto industry is so inefficient and dominated by the concept of planned-obsolescence that such a thing would be a game-changer on a lot of measures, even though it wouldn't take a whole lot of exotic materials or unknown concepts nor exceptional creativity to make it work, just a lot of time and resources which the major automakers have in abundance.
The lower the weight and CdA, the better, although I doubt the Dyson will approach anything close to a velomobile in terms of weight/drag which would be the ideal for a maneuverable urban hoonabout jackassmobile AS WELL AS something designed for as low energy consumption as possible during mundane A to B travel. Performance and efficiency better work in tandem with each other, than against each other. The current way cars are built is totally backwards. A vehicle with a CdA under 0.2 m^2 and a weight of under 500 lbs would be even better!
I like what Cedric Lynch has in mind for a vehicle:
https://www.youtube.com/watch?v=omIlvnNqFyc&feature=youtu.be
Functional. Reliable. Efficient. Economical.
It gets him from point A to point B, he's put over 60,000 miles on it as of that video, it cruises at 60 mph on only 1.2 kW, and he can go 100 miles for a few pence of electricity.
The only thing he's missing is "Practical" and "Fast", both easily doable without compromising any of the aforementioned desired traits possessed by this extraordinary vehicle. The vehicle is plenty practical for the one person who designed it and can safely operate his own machine, but I meant "Practical" in the sense of being able to pass inspection in most U.S. states, carry more than 1 person, possess rudimentary climate control and radio, possess workable windows(simple mechanical crank windows are ideal), not have to balance it on your feet when stopped, protect the rider and passengers in a high speed crash(roll cage, safety harness, and no airbags would be the beginning of the ideal, screw regulations), AND where any dumbass Boobus Americanus that can be given a license so that they can carelessly drive their clunker 5,000 lb SUV while drunk and hopped up on prescription meds with a lead foot in the bike lane while texting on their cell phone in one hand munching down a fast food concoction with the other while fixing their hair in the rearview mirror would still be able to "safely" operate this vehicle if desired, were they uninitiated to the vehicle without having to read the owners manual(which you know they won't).
"Fast" isn't that hard to do in comparison, given that the average new car does 0-60 mph in around 7 seconds.
But all of these tasks in the same car should be very simple for the multi-billion dollar automobile industry to accomplish in an affordable entry level vehicle, but they don't ever sell such a vehicle nor anything even a quarter of the way to it from where the industry currently stands. They'll make 60-100 mpg concepts using conventional materials demonstrating their capabilities and stir up interest and purchase offers, only for the consumer-desired products to never see the market. They'd rather sell you incrementally more efficient products in the meantime, rationing out each new advancement as slowly as required to maximize margins on the R&D expenditure, while commonly only pressed into action when the burdensome government regulations that these companies wrote to kill independent competition, demands it,
When you give the Lynchmobile 4 wheels, it would start to resemble an Edison VLC2. It wouldn't need much power to out-perform the average new car either, maybe 40-50 horsepower to go "fast"(0-60 in under 7 seconds), with potential to give the car hundreds and hundreds of delicious horsepower if desired for racing about, without vehicle efficiency during normal driving conditions being compromised much. As it is, Cedric's machine isn't all that slow anyhow, as it will more than adequately keep up with traffic with its 20 horsepower and still wouldn't be the slowest-accelerating motor vehicle on the roads.
Another interesting vehicle is the VeloTilt, needing 750W to do 60 mph:
https://gearjunkie.com/velotilt/
Efficiencies on the order of 20-30 Wh/mile in urbans areas are totally doable for a highway-capable and "practical" vehicle, and anything capable of seating 4 passengers or less that needs more than 150 Wh/mile to fly down the highway at 75 mph is IMO extremely wasteful when compared with what is possible. This means virtually all of the cars on the road are energy hogs, needlessly wasting non-renewable resources and destroying the biosphere.
If Dyson came up with an all-wheel-drive 4-wheeled tandem two-seater that could get similar efficiency to the Lynchmobile, I'd be on it like flies on dung regardless of its performance, and I'm probably not the only one. Of course, getting something as light as that to perform well isn't delving into the unknown either, and if it could blow the doors off of a new car and was an "entry level" vehicle with a low cost compared to the average new car, I bet it would sell quite strongly.
The motivation for the current state of affairs in the industry is to bilk the "consumer" class serfs of their money instead, without concern for what the impact will be on the planet and the long-term viability of the human race that relies on it for sustenance. This model of planned obsolescence needs to die.
Dyson isn't a car company yet. That yields some hope that we will get something more along the lines of what Cedric Lynch has built, than what the auto monopolies are currently churning out. But I'm not expecting that unlikely scenario to be the one that materializes, either.