Wii Virtual Console games will transfer over and be playable on Wii U. In an interview with ABC News, Nintendo Executive Vice President of Sales and Marketing Scott Moffitt revealed that users would be able to transfer over their Wii Virtual Console games. These games would retain their original display resolution, as they do on the original Wii.
Cool. After 3DS, I thought they would be, but it's nice to see it confirmed. So if I keep my Gamecube, do I need a Wii now? Gamecube controller support in Brawl and other such games would be the only reason that I can think of to keep it.
It's funny, because it's a feature that I personally "demanded," but I still half-expected them to weasel their way out of it. If they are trying to instill our trust in digital downloads, it's a necessity. We have to feel like we own our games, even if we don't have a physical copy.