Why would I want to buy a 720? I don't like the idea of always-on DRM, because it adds an unnecessary point of failure to the gaming experience. Microsoft's dashboard is designed to serve ads, not to navigate around games. And I imagine it will only get worse.
At least Sony is spending a ton of money on indie game developers...MS doesn't seem to have a plan except "the same stuff, only even more customer-hostile!" I've never been so unimpressed by nextgen offerings.