I think a digital ecosystem will be the NX's great "Wii-like" innovation.
There's honestly no good reason to stick with physical, and honestly, the masses will never move on on the console side completely until one of the big 3 has the balls to light a fire under our asses and force all digital on us, much like Apple did with the iPod.
Microsoft almost did it, but they wimped out at the last second, mostly because it was poorly executed. I think the NX, specifically the NXDS, will try it next. Let's see if Nintendo can execute it better. I think the rumbling have made it clear that they seem to at least be on the right track.







