That seems great in theory, but many people still have really restrictive data caps on their plans, so I'm not sure we are quite ready for that model.

It would also suck if you had an app on your phone like a star/constellation map, which you only use every once in a while when you are out in the middle of nowhere... To have your phone automatically delete that app, then try to re-download it when there isn't any way to do so would be a pretty awful experience.

Works well for something like the Apple TV - I don't think it's good for phones yet.