I think hardware will not be an important part in the Nintendo's future. Maybe they will develop an OS like iOS or Android were they will upload games. Some can be played on your portable (smarthphone) or others on your console (tablet). Some even on both, and of course, they will look better on your console.
Proud to be the first cool Nintendo fan ever
Number ONE Zelda fan in the Universe
Prediction: No Zelda HD for Wii U, quietly moved to the succesor
Predictions for Nintendo NX and Mobile