Yeah, I remember my Dad being sure that minidisks were going to be the new way we listened to music and then it was replaced with... CD's? Something. I'm sure we could think of heaps of examples.
With cars I think Brad was thinking hydrogen. I'm not much of a mechanically minded human (not my natural kind of intelligence) but it seems to make sense to him. I'm just like:
"Can't we use human power (to get us to exercise more) or use that ridiculous amount of sunlight we have landing on this massive contintent every day to power us to get from A to B?! Like, surely!"
Ah, I don't mean to guilt you. We're all human. We all like different, particular, sometimes perculiar human things. I think that's part of the fun of being here. And heck, like I can talk: we drove our 4WD more than 400km last Saturday essentially just to collect another 5km parkrun location. So... you know, humanness.
We have hydrogen buses here in Adelaide, they work fine. A pity the public transport system is a shambles though.
I was thinking human power might work...I'm going to get me a palanquin and some willing volunteers to carry it. #wayofthefuture