The Wii U is backwards compatible, has no used game restrictions, no DRM other than needing the disc, has embraced downloadable games, has an open policy for indie developers (unlike Microsoft), has a decent (though not brilliant) community function, no charges for the online network, has a very attractive back-library for the Virtual Console (though they need to speed the release there, especially for those already released on Wii, though you can still use the Wii VC anyway on it), it's small, it's very attractively priced compared to the other consoles...
.. oh, GAMES, yeah. They forgot that bit.
I don't care there as my only interest in console gaming is quirky stuff like the Wii U does; I do all my other gaming on PC. The Wii U suits me well, and Monster Hunter Ultimate alone has kept me busy for a good while. More boradly, though, there is a bit of an irony here that the console which ticks so many boxes about what gamers want from consoles is in difficulties because it's failed to tick the most important box of all.