The thing is I'm not advocating killing the Wii U at all. This strengthens the Wii U IMO by giving it two outlets for its software.
The core Wii U could still aim at families, budget gamers, kids, the Japanese market etc.
The new higher end console would have the same exact Nintendo games as the Wii U, but just with a selection of PC ports from third parties.
It would basically be a Nintendo system (New-age NES/SNES) made specifically for the Western market, whereas the current Wii U is really made in a lot of ways for the Japanese market IMO (small size, super low power consumption, low cost for families, etc.).
If the vanilla Wii U sells 30 million consoles, and lets say this "New Nintendo Entertainment System" adds another 30-35 million ... suddenly that's a fairly respectable userbase of 65 million households that can go out and purchase a game like Mario Kart 8. If they both go north of 40 mill, then suddenly Nintendo's turned a generation that was looking like a big retreat into a 80-90 million userbase for their own games and multiple options for third parties (easy/cheap PC porting or making a lower cost Wii U game at its base which can also play on the New NES in 1080p or higher to gain access to a wide variety of consumers).
It's good for third parties and good for Nintendo too.
