Sony originally locked the full speed of the PSP CPU at 266 MHz before unlocking the full 333 MHz like two years after release with a firmware update. I don't think Sony ever officially explained why they locked the CPU, but most speculated it was due to battery life concerns.
There was also a rumor (I don't remember if it was confirmed) that Nintendo did something similar with 3DS and unlocked a second CPU for 25% more processing. I'd imagine battery life being a concern here as well. I believe this rumor also mentioned something about Nintendo figuring out a way of handling stereoscopic 3D which would reduce the strain on the CPU for more processing power (of course, not using 3D entirely would help out even more).
It was most likely both where due to battery life as any titles that used these functions had limitations. On PSP Wifi/Networking had to be switched off. On 3DS the StreetPass/SpotPass Functionality is lost. Just trade offs for better speed over functionality.
If this additional core thing is true, the battery life explanation doesn't really work here. I guess the dev kit reasoning works. Even so, I doubt it would open up Wii U to Super Saiyan levels of power like people are making it seem.
I don't even think it exists simply because we haven't found anything additional on the wafers. Almost everything is accounted for internally thank to those great die shots from Chipworks, unless there is a hidden processor on the GPU (other than Starlet) then it doesn't exist. And if there is something on the GPU it must be very small and have little impact on performance.[/font]
By the way, the GamePad is a gimmick. That's not inherently bad. People just often read it that way. I love the GamePad though only games that can use it well should use it at all. Just because something is there doesn't mean it has to be forced into every game.
Gimmick is an over used word that tries to make the idea seam cheaper or less important than it really is. Like you said, it's an awesome feature but it's not a requirement.
The PS1 was technically weaker, but the N64 had the retarded cartridges that developers had to work with and made certain things difficult. Hell, certain games are still hard to emulate with today's technology because of how weird it was made.
Just talk to a developer on the N64 about the "joys" of microcoding the graphics side of N64. Step back and watch them fume with rage.
That's not true, 1/2 the WII U memory is for OS, not sure about it's cores but I'm guessing one core Is reserved for the OS/gamepad.
As far as we know the Gamepad video is encoded with dedicated hardware on the GPU, a task such as that is too slow on a CPU. That said we could still lose a core to the OS, I haven't really spoken to many developers in detail on how the Wii U works and I'm sure they wouldn't' tell me anyway.