Not so sure. Hardware sales are slowing down for all systems. Artistically, yes, it is relevant if a piece of hardware has not been tapped fully into, but business-wise? If sales come to a halt then you can be rest assured that a new piece of hardware is coming to the forefront.
And next year will not be as nice to the big 3. Microsoft luckily had Kinect to help them through and Nintendo had their Sports Resort and NSMBW from waaaay earlier in the year (Donkey Kong was a nice sell, but it didn't carry them this christmas). Sony, the one who wanted to stay in the generation the longest, wasn't as lucky as the other two.
I can possibly see Nintendo scoring another Sports Resort type hit with Zelda: Skyward Sword, and that is because it uses the Sports Resort mechanics as the main gameplay system. And it's those types of hits that move hardware. As for the other two guys, there will not be any other major hits coming close to the relavancy of Kinect or Black Ops.
We'll see new hardware from all three the November two years from now, at least. Not this coming year though for Nintendo considering that they can't release a huge motion controlled Zelda hit only to have it shine sales wise for a year.
