Yeah Miyamoto is only saying that a new take on Mario probably won't happen on the Wii U, so my hopes of an open world evolution of say SM64, with the full Mushroom Kingdom and entire Mario world seamlessly integrated probably won't come to Wii U, but that doesn't mean Wii U can't get it's proper 3D Mario release.
It's highly doubtful that the Wii U will only have a 5 year lifespan, hell 6 years at minimum would be a good bet, so we probably won't hear anything about the next Nintendo console until E3 2017, so 8 years without a mainline Mario release on a Nintendo home console is what people are saying when they say that Wii U won't get a main 3D Mario title, which is a ridiculous notion.
Personally I can't class SM3DW as that big Mario release that Wii U deserves, it's a stop gap, essentially a port of the 3DS game, with some extra additions, not a proper 3D Mario game made to take advantage of the features of the Wii U like SM64 was for the N64, Sunshine was for Gamecube or Galaxy 1 & 2 were for the Wii.
Hell I wouldn't be shocked if we see another Zelda release after The Legend of Zelda U comes out, even N64 (Ocarina of Time and Majora's Mask) and Gamecube (Twilight Princess and Wind Waker) had 2 mainline Zelda games.
Wii had a port of Twilight Princess and got Skyward Sword as it's mainline Zelda games.
I suspect we'll get an announcement of the next Mario at E3 2015, to release in 2016 or 2017, along with Metroid, maybe a Wave Race or F-Zero and some new IPs.
