I won't say that he's right, but rather that he's possibly right.
My take is that, when you're talking about multiplatform titles, early games are going to really try to use the Wii U tablet interface, but then that's going to kind of fade away. Ports will be ports, with most games not being substantially different on the Wii U than on the PS3 or 360. In that regard, it really does become just another part of the current generation. The Wii U might be more powerful, but games designed to play on all three platforms aren't going to take advantage of that.
The difference, of course, will be with Nintendo designed titles and third-party exclusives. If you're buying a Wii U for those, then you will likely be very happy. If you're buying it to play multiplatform games, however, and you already own a PS3 or an Xbox, then it's possible that the Wii U isn't a very worthwhile investment.
It's going to depend on the developers. As with any other system, the games are the important part.
I probably won't buy one. That's not a knock on the Wii U, it's just that I'm not personally a fan of Mario games or the platformer genre, and I'm not convinced that the tablet interface is going to add enough gameplay value to cross-platform games that it would justify buying another system -right now-. If that turns out to not be the case, then awesome, but that's simply how I'm thinking presently.
