Well if they have done things properly for the Wii U, they will have a lot to say about the system itself. Not particularly about what the system can mechanically do but the services, such as how online will work (1st party and 3rd party probably), all the netflix and possible tv services, the new video chat functions and so on.
If anything, these services are one of the biggest differentiators next to a games line up.
And now I'm going to have to watch those smug fests that are the Ubi and EA conferences! DAMN YOU WHEATON!