Marc Andreessen writes about the three kinds of internet platform. It’s great to see this conversation in the open, it’s a fundamental change to where applications live.To me the interesting thing about ideas like Web OS and applications that live on the network is the assumption of the network. Today the network isn’t everywhere in any broad sense. There are hotspots, some folks have EVDO, but the network doesn’t follow you around. Of course, depending on who wins the new wireless spectrum auction, this could change radically. Broadcast television goes away possibly to be replaced by broadcast internet with a whole new set of applications.