What people are talking about when they say this stuff is that they want to use them as input devices. When I play a game on the Wii, I pretty much always say "this would be much better with mouse and keyboard." Sure, the Wiimote is cool, and it makes some sense in living rooms*, and I occasionally still have fun playing Wii Sports Resort. But show me a game that makes me point at the screen a lot, and pointlessly waggle the Wiimote periodically, and I'll show you a game which would be better with keyboard and mouse.
Pretty much all consoles with USB ports will let you enter text into more or less all input boxes, even on the Wii. But almost no console games, even an FPS, will let you control the game with keyboard and mouse. We all know why, but that's a feature much needed to win over fence-sitters. Whether it's worth it is another discussion, although my guess is no. We will never be happy with consoles. That's why we have PCs. We occasionally flirt with consoles and then realize that they are lame if you don't have a bunch of gamers in your living room regularly.
* The Wiimote is a crap remote control. That may not be its primary design purpose, but as it turns out Netflix is probably what most Wiis are being used for today...