Although it was declared that the Wii U would run with 1080p in last week's Nintendo Direct, Katsuya Eguchi, designer and manager at Nintendo, has just announced that most Wii U games will be released at 720p instead. Why the downgrade? Framerates. Eguchi stated that framerates will run at 60 frames a second on 720p, but that they may suffer if games are produced at a resolution of 1080p.

To quote from the interview, Eguchi stated the following:

At Nintendo we have different teams working on different games that take into consideration the resolution. If they think that by focusing on 720p and a certain framerate to get a certain experience, than that’s ultimately how they make their decisions. We might consider using 1080p, but, for example, if we want to get 60 fps, at a particular stage of development, it may seem 720p is more realistic.

Even so, the Wii U is capable of supporting games at 1080p - it's just that managing the framerate and lag is more difficult at that level. As of yet, no games have been announced at 1080p, but it's also known that different teams at Nintendo work on different games and resolutions, which may mean that gamers could potentially see Nintendo titles at 1080p - it just isn't likely.