There are few clearer bellwethers as to the imminent direction of technology than where venture capitalists put their money. They're about making money, so they look for industry patterns they think will lead to sure bets. And that means they invest where the tech industry has begun to coalesce its thinking, not on exotic new science fiction. According to PricewaterhouseCoopers, VCs have invested a total of $57 billion in startups -- mostly tech ones -- in 2005, 2006, and 2007.