First: not a system seller in any way. Nobody will buy a system because the ability to play the games of the iteration before. Not for now at least.
Second: the wii mode is a way to prevent the use of the exploit of wii to acess the new console architeture, so they split it out to prevent this kind of use. Put the game on the e shop would involve a major rework on the system, something nintendo is not willing to do.
Would be cool, i know, but bussiness wise would a be a poor move. Nintendo need to focus on make games unique and only avaible on wiiu, you know? Something that make the people really go out and buy the console. When most of then get it(10 mil), so nintendo should worry abouit ho didnt have the wii(like me). Wait n64, gba and anothers game consoles come over, then expect the launch of the wii games.
"Hardware design isn’t about making the most powerful thing you can.
Today most hardware design is left to other companies, but when you make hardware without taking into account the needs of the eventual software developers, you end up with bloated hardware full of pointless excess. From the outset one must consider design from both a hardware and software perspective."
Gunpei Yoko
