And what's interesting about the hybrids taking off is you've now introduced electric motors to the automobile industry. It's the first radical change in automobile technology in 100 years.
And this is one way to do technology forecasting; get a sense of where technology is, and then anticipate the next upturn.
The first stage in a technology's advance is that it'll fall below a critical price. After it falls below a critical price, it will tend, if it's successful, to rise above a critical mass, a penetration.