All these Silicon Valley *geniuses*, flush with millions of dollars of venture capital... And nobody saw this coming?
I remember speaking to engineer after engineer about putting solar cells all over the roof and trunk and hood of every electric car -- and they all ignored my ideas, saying that the panels couldn't generate enough -- but that's not the point -- the point is that a car spends MOST of its life parked, and while it's parked it could be generating some power.
That's like the time I'm at the NY Auto show and my GF and I notice all these SUVs come with glass roofs, and my GF complains to the salesman that these cars are too tall, it's hard to get the snow off the roof. So I suggest to the sales guy that they run the wires through the roof like they do with the rear windows to heat up the glass and melt the snow. Dude whips out his iPad and starts typing furiously. I suspect the auto industry owes me a check.
Anyhow, point is: Sometimes the obvious escapes people.