The 500-channel universe is old news. Video-on-demand? Been there, done that. TiVO is standard viewing equipment for at least a chunk of the populace. And could television be on the verge of yet another major paradigm shift? You’d better believe it: “Once upon a time, you found TV. Now TV will find you. We’re already watching in elevators, bars, airports, banks, dentist chairs, on street corners. Soon, more of us will be watching on cellphones, in cars, on newfangled wireless gadgets, and if this keeps up, on a tiny matrix implanted into our bionic retinas.”