What should Nintendo invest in with all the money they are making?

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i really wonder how the next nintendo home console will be
in the past you knew what you could expect: an upgrade of the current console, like everyone has done

but with the wii nintendo changed it's course..

so how will they follow it up..?

and what will the next console of sony and microsoft be like..

i know we should enjoy the current consoles, but the next generation is gonna be just as interesting as this one, if not more interesting..