I actually hope the Wii U ends up like the gamecube; the gamecube was amazing. It had top-tier GOTY exclusives that truly made it worth owning. Sure you needed a PS2 as well in that gen because gamecube didn't have many games but that doesn't stop it from being an amazing console.
The Wii, while a financial sucess, was weak compared to the glory of the gamecube. I'm hoping the failure of the Wii U in terms of penetrating a casual market will bring us back to that golden age. PS4/Wii U combo where Wii U is gamecube like is perfect.