Xbox Live Everywhere!
I've been reading recently about xbox live games coming to other platforms, and I think this is awesome. But I think they should take it one step further. I think x-box live should come to every platform and be the multiplayer hub that connects everyone together. The idea of Microsoft getting back to its hardware agnostic roots is really exciting. Yes it would be a bit of a bummer for those who bought a windows phone and like that exclusivity, but the ability to play mobile multiplayer games over any platform is much more interesting. Plus, you can always keep the most full featured experience on windows phone. If you think about it, the killer app for windows phone is not xbox live, but the hub and user experience. I think windows phone would do just fine, maybe even better, if some of its unique software and UI made its way to other platforms. I really hope this happens.