It is a good topic.
Feature wise, I think Nintendo can do a ton of things to outdo the wii.
More bang for the buck would not be hard IMO
-graphics (these actually are important)
-hard drive
-online service/community
these would not be clones of the HD consoles similar features, but done the Nintendo way
-a new innovative feature - This one would be the best option for Nintendo but a very hard one to repeat. This is because most innovative new ideas in gaming going forward would involve making a more expensive console.
Refining the original vision of the wii would be the best IMO. take motion control to a whole new level, with a combination of wii like controls and head tracking, all in HD. (if they can beat Microsoft and Sony to the punch)
But as the wii has proven the only thing Nintendo needs to outdo itself is to repeat the same process and have spectacular marketing.
̶3̶R̶D̶ 2ND! Place has never been so sweet.
