Local mobile or roaming networks are probably going to be more important as time goes on. We network the computers in our homes, but when we're out and about, the only networking we get to do is between each phone and its service provider. The only multi-player games on your phone or tablet are connected to Facebook. The only data sharing you can do is up to a server and back down again, even if we are right beside each other. The mobile network is stressed enough as it is, and it's only going to get worse as more people sign up for more phone and data plans. Eventually, we will need our mobile devices to talk directly to each other.
Mokalus of Borg
PS - Imagine a mobile phone network that gets better the more people that join up.
PPS - That's the future.