Epic has not declared its Wii U strategy yet.

[odellwwww]

http://www.computerandvideogames.com/349607/unreal-engine-4-epic-says-it-has-not-declared-its-wii-u-strategy/ 

I still believe Geoff Keighly's tweet was based on a previously built Wii U dev kit (GDC was back in march) and things could change come an e3 reveal.  Either way im still getting the system day 1.