Where We're Going, We Don't Need Roads...

Well, we'll probably still need roads, but maybe not gas. The term "air cars" sounds very futuristic, a la flying cars and auto-lace tennis shoes. But while the technology isn't anything too new (basically stored compressed air is gradually released to drive a pneumatic engine; here's the Wikipedia article on compressed air engines), if Zero Pollution Motor's vehicle actually do find their way into the US market by 2010 (a claim highlighted in this post at Core77), it would feel very futuristic to be able to walk into a dealership and drive away in a car running on air...it almost sounds like a nonsensical dream.