They released some pics of the gh3 controllers this week and I've got a feeling that wii owners are going to win on this one with a lower price point. By looking at the pics, it appears that the wiimote plugs into the guitar, which means that the controller itself is just a add-on. This means the controller just needs simple usb-like guts and no bluetooth or tilt sensors. In theory, that means it could sell for as little as 30 bucks, as opposed to around 60-70 for the 360/ps3.
No real point to this post, I just wanted to mention it before the press conference when everybody finds out the real pricing.