At this yearās E3, Nintendo showed off Wii U āgamesā that were actually taken from 360 and PS3 versions
https://lastchance.cc/nintendo-used-360-ps3-pc-game-footage-in-its-wii-u-d-5809744%3C/a%3E%3C/p%3E
According to one report, the reason for this was that developers only had access to āunderclockedā Wii U development kits, able to produce games that werenāt quite up to current gen snuff.
https://lastchance.cc/report-developers-working-with-underclocked-wii-u-hard-5812391%3C/a%3E%3C/p%3E
Dunn says this about the Wii U: āa lot of things are falling into place, in terms of how easy the machine is to develop for.ā
New Wii U hardware for devs in June/July News [Eurogamer.net via Develop]