Well that sure would be one feature that would distinguish it from the others. However, my guess would be that it won't have it. I think this would have to be a change to Android in terms of how an app gets loaded to run. What happens if you lose your connection while using the app? Does it copy the app down to your phone when you launch it? If so, when does it get removed from your phone?
These are not showstopper issues at all, I just think some of the functionality needs to be baked into the OS.