I'm sure no matter what Nintendo comes up with, Sony and MS have something they are messing with that they can shove out their to say "Me too!" That's how it works. You create the illusion that you have feature parity if the competition comes out with something new. The competition has done it with: D-pads, shoulder buttons, light guns, portable systems, analog sticks, trigger buttons, wireless controls, rumble, motion controls, avatars, second screen game play, and that's not even getting into the games!
The R&D teams at Sony and Mircosoft surely have prototypes or are associated with companies that have technology like:
- Portable console gaming
- Holograms
- Mini Projectors
- Haptic feedback
- Augmented Reality
- Lightguns
Or whatever else Nintendo comes up with.