i think NX was going to have trouble regardless but...
...the advantage for sony on iterative hardware is never having to hit the "reset" button each generation. now my investment is in playstation the gaming platform not the ps4 the peice of hardware that plays games. with sony dominating the market now that domination kind of extends indefinetly. it's not impossible to displace them but really hard. very few people change between apple/android smartphones because of their investments in the platform. it will now be the same with playstation and xbox.
The thing is it wouldn't surprise me if Nintendo was hoping to do this with the NX but it looks like Sony is beating them to the punch entirely and MS is thinking the same thing too.
So it kinda leaves Nintendo now in a very awkward position.