They need to find a way to convince 3rd party to support their home console.
I think Nintendo should make their home console as power as Sony and Microsoft and innovative in the same time.
PS4 - over 100 millions let's say 120m
Xbox One - 70m
Wii U - 25m
Vita - 15m if it will not get Final Fantasy Kingdoms Heart and Monster Hunter 20m otherwise
3DS - 80m