But we no longer need revolutionary changes to achieve crossover. We can get there with small improvements in electricity yield, in manufacturing processes, in installation costs, in the channel. A host of labs, venture capitalists, and start-ups are bringing those improvements toward the market right now, because people see the opportunity. Fossil-fuel advocates are pulling out all the political stops trying to delay or ignore crossover. Locally, they claim the panels are ugly. In the states, they fight renewable energy targets. Nationally, they ignore pollution and seek to lock in dirty tar-sand production with every dollar they have. If this were a political struggle, I'd say we're outgunned. But it's not. It's the market. Crossover is coming. The oil barons are selling adding machines and typewriters at the dawn of the PC era. The writer owns no stocks mentioned in this piece.