The Wii U reveal at E3 2011 probably didn't go quite as Nintendo had hoped, with some confusion over exactly what the console is and how it works. Nintendo president Satoru Iwata is keen not to make that mistake again though, and has revealed the console will be shown off in its "final format" at next year's E3.
That could mean the machine itself will be altered, or we'll see an official name and some real software for the "new controller", but whatever it is Iwata is determined to show off the console in its best light:
We are also planning to launch the Wii U, which is the successor to the Wii, during the next fiscal year. We would like to show the final format of the Wii U at the E3 show next year. As we learned a bitter lesson with the launch of the Nintendo 3DS, we are trying to take every possible measure so that the Wii U will have a successful launch.
Here's Nintendo's concept video for Wii U from E3 2011: