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. ↗
Obama sounded like Al Gore on global warming. The more the case for man-made warming falls apart, the more hysterical Gore gets about an imminent catastrophe. The more public support his stimulus bill loses, the more Obama embraces fear-mongering. ↗