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They didn’t seem to mention turning the wheel
In the video at roughly 4:20 they seem to be using single CV joint at the front to handle turning. Seems kinda constrained, but what do I know.
but what about unsprung weight?
Could be worse. Did you see all the in-wheel concepts Hyundai were show casing last year? I wouldn’t take this any more serious than all the ridiculous concept cars makers like to showcase. Still this might find some uses in niche cases, tiny city/kei cars, but probably won’t see usage in regular cars anytime soon or ever.
Nah, copying the HP printer+ink model is much better for them. Make ICE cars dirt cheap, almost free and then charge an arm and a leg for the fuel.