Take all of this as mere rumor until the official news arrives in one week. According to the developer, the Nintendo console will launch on November 23, 2012 (worldwide?) and cost somewhere between $350 and $450 USD -- the price still isn't set in stone. The GPU of choice will be AMD's Radeon HD 6770 which will support not only DirectX 11, but Epic's Unreal Engine 4.
As for other specs, the rumor dump claims the console will sport 2 GB of RAM, 560 MB of which will be dedicated to the console's operating system. The Wii U's user interface will be customizable whereas the console itself will come packed with pre-installed software. It will also support touch-screen controllers.
On the Ubisoft front, slated games include Rayman Legends, The Avengers, Assassin's Creed 3 (which will run at 60fps at 1080p, compared to 720p on PS3 and Xbox 360) and Just Dance 4. Killer Freaks from Outer Space is set to arrive weeks after launch.
The Ubisoft developer also states that Crytek and Electronic Arts are working on Wii U products -- this factor is old news. Valve, on the other hand, is also reportedly bringing its Steam service to the new console in addition to ports of both Portal games. Achievements will be supported by the console as well.
Now here's an interesting tidbit: multiple versions of the Wii U are currently in the hands of developers. Does this mean Nintendo will offer tiered models? This seems unlikely given the company's past releases. The note seems to indicate that Nintendo may have provided multiple configurations to see what developers liked best while keeping the final cost to consumers reasonable.
Again, take all of this with a grain of salt. The Unreal Engine 4 report seems a little far-fetched given that it's finally able to run on a single Nvidia Kepler GPU -- unless Epic is offering a modified version of UE4 capable of running on Nintendo's hardware, that is. Rumor has it that Nintendo "tweaked" the console so that it could run Epic's latest engine. The company seemingly doesn't want to disappoint with this console, so UE4 could be a possibility.
Source: Toms Hardware