The Razer Hydra is the PC equivalent of the Wii controls. Being the most supported of the PC motion peripherals, it's support is still so miserable as to make it not worth a purchase. One can also run 3rd party drivers to get the Wii remote working through Bluetooth, but then things get complicated on the side of getting games to work with it.
In the end, if you want Wii style motion in HD, get a PS3 with Move. Come with a healthy desire to play shooter titles exclusively. If you want Kinect, get a 360 and Kinect. Be prepared for the Kinect to register what you want to do only about half the time. If you want motion games that are actually of some quality, get a Wii and buy Nintendo published titles.