At 1m^2 for the panel and a top end panel its going to peak out at ~230W. In an hour that is 230 Wh. That is 230Watts during the peak hours of the sun assuming its angled to directly capture the sun, which it doesn't appear to be in their concept CGI. Its probably going to be less than that.

The Zoe which is a small electrical car has a 100KW engine for acceleration purposes. It goes 4.5 miles using 1Kwh of power at 31 mph (20C). It will cover that distance in 9 minutes at that speed. 230Watt hours in an hour of charging is a very far way from the 6.9Kwh needed for an hour of driving and this is optimal conditions as people brake/accelerate and travel faster than 31 mph.

This design might reduce the cost from the grid a bit and be useful for camping and trickle charge a bit through the day if its in a car park etc. But its not enough to run even the smallest electrical car today, its an order of magnitude off and even with a 100% efficient panel the cars would need to be 7x more efficient than they are today, and electric cars are already a lot more efficient than combustion engines.

It fundamentally doesn't add up as a concept.