Nintendo President Satoru Iwata recently sat down for an interview with the San Jose Mercury News and during the short Q&A he confirmed that the Wii U will include 3DTV support:
If you are going to connect Wii U with a home TV capable of displaying 3-D images, technologically, yes, it is going to be possible, but that’s not the area we are focusing on.
When it comes to 3-D, we already have the 3DS, and each owner of the Nintendo 3DS is capable of viewing 3-D images. However, when it comes to the home console, it depends upon the availability of 3-D TV sets at home, which, unfortunately, is not expanding enough. And rather than pouring a lot of energy into that kind of area, with the Wii U we’d like to focus more on each Wii U owner being able to have an equal opportunity to enjoy it.
So basically, it sounds like the Wii U will support 3DTVs, but don’t expect a lot of 3D content from Nintendo.