Wii U of course launches next year but I still don't think that MS and Sony will do the same. Nintendo will have full blowout 2012 E3 and will launch Wii U autumn. MS has maybe small teaser about next gen like Nintendo had this year but they will have the full blowout following E3 and will launch between summer and autumn 2013. MS has new halo release for next year and X360 is still doing so well so they will wait that extra year. Sony will focus next year in Vita and their E3 is completely about Vita and PS3. They will reveal PS4 E3 2013 like MS and will launch same time or some months later.
Also next gen started already this year with the launch of 3DS......








