This is going off on a tangent and isn't discussing Wii's GPUs, so perhaps should be moved to the future consoles thread? Still, while I'm typing...
I think Nintendo have in a way backed themselves into a corner. For all their current machines, one of their big plus-points is cheapness to develop for. To go from cheap and simple to complex, powerful hardware, is going to be a major shift. That is, if Wii2 is comparable with a PS4, that's equivalent to a 2 generation leap in technology. A Wii2 couldn't be as powerful without going massively multicore for example, so Wii developers would be smacking into the problems that PS and XB developers are used to from the previous 4 years.
I don't think Wii2 will be as powerful as PS4, and certainly not nearly as complicated to develop for. I'm sure Nintendo will go for a fairly simple design and programming environment. by 2011, programming on a powerful dual-core CPU should be trivial for any developer since they will have had to have gotten used to triple core, quad core, and 8 core programming. Also, powerful GPUs are not hard to use at all. I think Nintendo Wii2 and PS4 could parallal Gamecube and PS2. Nintendo had a simple but powerful CPU for Gamecube and a simple put powerful and high quality GPU. Sony went for a complex CPU for PS2 and a complex and powerful but flawed graphics chip for PS2. I think Sony will stay well ahead of Nintendo in the CPU race, but they could have comparable GPUs, even if Wii2 GPU is less powerful than PS4 GPU. Nintendo will keep things simple for developers, they will keep manufacturing costs down, and development costs down, while offering a reasonable console in terms of CPU, graphics and memory. the key thing will be a further improvement of the "Revolutionary" aspect, the Wii Remote, or something that is another leap in gameplay/control.
I wouldn't be surprised if Nintendo pitch their hardware technology to fit the software technology. If multicore development on asymmetric systems is easy by then, they may choose that route. If that route has more power but is harder, they may well pick symmetric multicore. Likewise they may well stick with older rendering tech to keep to something devs don't have to struggle to use.
they've always gone with hardware that suites the needs of the games that they develop anyway, so it will be much the same with Wii2 or whatever they call their next console. they could ask to ATI come up with new rendering technologies that are easy to use. typically new GPUs are very easy to use. so easy they that get maxxed out rather quickly. it's the CPUs that are difficult and that's where I see Nintendo keeping things simple, not crazy with dozens of cores and different types of cores. as I said, a nice powerful dual-core G6 or Power6 derived CPU should be just fine, while providing a tremendous leap from bith Gekko and Broadway.
I can't see a clear direction for Nintendo. I think their current choices were only for now, and they haven't a long term plan on how to develop them. They're providing simple games with different interfaces. Repeating these interfaces just with more power is adding cost of development without gains that Nintendo recognise as being important. They've said repeatedly graphics don't matter. To then release a new console that's the same as the previous, only with better graphics, they're ignoring they're own philosophy.
Okay, wouldn't be the first time
graphics do matter to Nintendo, just not having the graphics as the #1 thing. if graphics didn't matter to Nintendo they would've released Wii with the exact same GPU, Flipper, as was in Gamecube. graphics won't be the main focus of Wii2 just like it wasnt with Wii, but at the same time, they can do a huge upgrade in graphics from Wii, without having a state-of-the-art multi-billion transistor GPU in 2011. Nintendo will continue to make both simple and epic games. brancing out to capture as much of the gamers and non-gamers as they can. that's their goal. if they fell too radically far behind in graphics, nobody would even concider buying Nintendo stuff anymore because a large percentage of the population still bases their gaming purchases on graphics / the initial visual wow factor.