Sony and MS will cast Wii U as a 'current' gen console as Wii was a 'last' gen console to them. They won't respond with a new console. Not for a while, and when they do, their new consoles will blow Wii U out of the water powerwise.
Sony will pimp Vita as a potential hand-held touch screen controller for PS3 games and probably have something that uses it in that way. Ta Da! A Wii U without buying a new console! (never mind the cost of vita.....)
MS will use the opportunity to target the casual crowd even more as Nintendo seems more focused on core ATM. Expect a lot of hype for new 'exciting' Kinect titles.
In my view Wii U is really an inbetween system and not the start of a new generation. It's Pachter's Wii HD, albiet late.







