It prob will be able to play atleast some of the titles, but just really downgraded in some aspects. Open world games though depending on which ones might just skip the wii u entirely. An example of this is the witcher 3 which is getting released on pc,ps4, and other highend hardware in 2014.
http://m.joystiq.com/2013/02/21/the-witcher-3-confirmed-for-ps4/