But, their little machine which seems to have a mini iPad as a controller is relatively unknown. But that doesn't mean we don't know anything.
Here's a quick rundown of things we know for certain, or at least near certain, anyway.
The New Controller
Pictured above, the new controller has really been what's garnering attention for the system. Instead of the tiny wand-like controllers from the previous Wii, the Wii U has a large controller with a very sensitive 6.9 inch touch screen on it. Demo videos have shown that this has a camera in it, which allows a Facetime-like video chat system to be used. It's also sensitive to movement, as seen when it clears the pieces from a go board. Perhaps the most revolutionary aspect of it is that you can turn your television off and actually play the game directly from your controller (although obviously it still needs to be connected to the system). All of the little gadgets and gizmos in this controller include: an accelerometer, a gyroscope, rumble support, the front-facing camera, a microphone, and stereo speakers. The good news is that it's rechargeable, so no more scrambling for AA batteries.
For storage, it has internal flash memory, though the amount(s) haven't been revealed. Storage is also expandable with SD cards and external storage.
The CPU is a 45nm IBM Power-based multi-core processor with embedded DRAM. It's said to be roughly 50% more powerful than the PS3.
As for the GPU, the Wii-U has an AMD Radeon-based HD GPU that will support up to 1080p high definition.
The only information we've got about RAM is that it's going to have a "large memory capacity".
Interestingly, Nintendo opted to go with just USB 2.0 slots for their controllers, much like the X-Box 360.
That's all the important info we have for now. Of course, stay tuned for any new developments.