Yeah, I don't think they had much of a choice last year. But they should've showed real game footage, even if it was just a head fake, a la the infamous Space World Zelda video.
I think it's actually good if both Microsoft and Sony go whole hog on copying the tablet. This will lead to more third party developer support, and more fully fleshed out tablet features on the WiiU than might otherwise have been programmed. Plus, competitive innovation, all that jazz.