Multi-media PCs improve performance, usability
“Microsoft says that, for optimal video streaming, Media Center users should buy and install a separate wireless network based on the less-common 802.11a standard and dedicate it to the Media Center extender connection. This is likely to add another $100 or so to the cost of the setup. Worse, it will plunge users into the morass of installing another network.”
The bottom line is that PCs are not ready to be integrated with home entertainment systems. Too much complexity!