The one feature of that huge Dell XPS M2010 LapDeskTop that hasn't been talked about is the Media Center Edition remote that ships with it. Instead of RF, IR or WiFi, this remote uses wireless USB that connects to connect with the M2010.
Using wUSB, the remote is capable of two way communication and can grab metadata from the computer to display relevant info, say, the volume. There's also the gyroscopic mouse technology for navigating menus, courtesy of the OEM, Gyration.
Unfortunately if you don't want to dish out close to $4,000 for an XPS M2010, you can't find this remote anywhere else on the market. However, since it's made by Gyration, there could be a generic OEM version due out in the future.