What TV time could be used for?

Seth Godin has an excellent point about the number of hours being spent watching TV - time that could be put to use against more ‘important’ matters.

Three, four or even six hours a day not spent doing virtually nothing. Multiply it by 800 million people online and suddenly, there’s a huge influx of hours just waiting to be put to good use.

It’s mind-blowing when you think about it. So how do we get the ball rolling - away from the TV and towards something truly useful?