said by From the Pres :

It's not about connecting two PCs or forwarding data from your ISP. It's about networking the high-definition centric multimedia appliances around your home.

For example, wouldn't it be nice to eliminate the HDMI cable. Or, come out of the HDMI port on your new Blu-Ray or HD-DVD player and being able to enjoy that device from every single HDTV in your home without connecting any new wires between anything.

Today, you can network your PC's. Why not your DVD players, game consoles, High Definition TVs, and the rest? Wouldn't you like to connect those things, but get rid of the rat's nest of wires at the same time.

It takes about 20Mbps to network a High Definition 1080i stream, about 35Mbps at 1080p. If you want trick play (pause, fast forward, rewind), multiply those data rates by four. If you have several rooms and different people watching different programs in different rooms, the data rate requirement goes up from there.

It also takes guaranteed Quality of Service, otherwise our video image breaks up and the video is not synchronized with the Audio. WiFi, Ethernet, etc., do not offer guaranteed quality of service - that's the primary reason you don't use them for networking high quality video.

So, it isn't about your ISP and browsing the internet or checking emails. It's about your entertainment content service provider if you use a personal video recorder in the set top box and want to network your recorded content around the home. And, its about networking all of your DVD's, etc., so that content - protected or personal - located anywhere in your house can be accessed and enjoyed from any suitable HDTV in your house without you having to run new wires or move your appliances

Sound like you might want that?