In 10 or 15 years, 20 at best, they'll all move to a service oriented model, i think.
Even beyond the idea of streaming, a more open approach to releasing all games on all platforms, as long as you get people into your service, is the more probable future in my opinion.
Isn't a console especially profitable BECAUSE you get people locked into your own ecosystem, anyway? Even 10 years ago, getting people into XBLGold seemed more crucial for Microsoft, than having them buy the plastic box.
Ironically, maybe Nintendo will be the last one to "go 3rd party", because they seem to love fucking with esoteric hardware so much.