the price of the console is pretty high
At launch:
Playstation 3: 20 GB model priced at $499, and a 60 GB model at $599
XBox 360: "Xbox 360" package priced at $399, the "Xbox 360 Core", priced at $299
Wii U: Basic: $299.99, Premium: $349.99
Average-to-low price as far as I'm concerned for a newly released console.
But being an owner of one, I can tell you that the tech is pretty neat, perhaps in line with Shinmera's comment of "gadget aspect" ... they're trying a lot of neat stuff that I'm assuming will be best proven in the next year or two. The included tablet controller allows you to interact with the core system more like a dynamic remote control (heck, it can even BE a functional remote for your TV) and will probably be best realized once some more of the media features come online. The continuous connection to the built-in online community is interesting ... in my experience playing NSMB U, you can comment or read comments from people who have been to the level you're about to enter or have completed. It's just kind of fun to shout out your accomplishments or difficulties. And kind of surreal when my sister who had gotten ahead of me had a comment show up when I arrived.
I've seen ZombiU which uses a sort of augmented reality aspect of looking through and moving the tablet controller around as a "scanning" device, which is something that I'm sure will be explored upon more. Nintendo Land also uses it as a way of interacting with the 3D world or as a private view port for an interesting take on multiplayer, e.g. in a "chase" game where the one to be chased is running off the tablet and the others are just running around trying to catch them.
I think there will be some great and unique experiences on the Wii U and then a bit after that Microsoft and Sony will come out with their own takes on the idea that are not as popular, that seems to be the current pattern.