They've apparently been working on wifi for a while, I heard ages ago (I think it was from Gary) saying that one good example was that location pins can send location data to Stern Pinball Arcade so that the users can get notifications whilst travelling: "Hey! You've been playing Ghostbusters a lot on the app, there is a real Ghostbusters pinball within 1 mile!"
Diagnostics, stats, updates - all these can be sent via the internet. Can't wait for it all to eventually come!