While there is an air of convenience to being able to pull your games from thin air, it's not really that difficult to carry around your games. Perhaps being able to store them on an SD card would be a pretty good comprimise. I like the idea of not having a load of plastic - but it's no great hardship plugging in a cable, or carrying a TV from one room to another. I keep my gamecube (yes gamecube,) packed away, if I want to use it - I just pull it out. If I want to listen to music in another room, I carry a music player through to it. But these days we are sold overly technical solutions to problems, like wireless music systems (with klunky interfaces), and such, which don't really give you much back. I was still watching an old school CRT tv back in December before it died on me, and once I was ingrossed in what I was watching, I didn't care what I was watching it on. Same goes for SSD's on computers, sure they increase boot and load times - but who cares about 2mins vs 40seconds? It doesn't really matter.

I'm not following the sharing idea - can you share a title at no expense? Can you lend a title? That sounds great. Don't get me wrong, I'm up for a little added convenience - but as other's have said - downloading a few Gigs to play a game - is currently more difficult (and probably wasteful,) than just copying the game onto another medium and walking somewhere with it.