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Designed mainly for getting grandma and grandpa (GM+GP) online, WebTV never got much respect from early adopters who scoffed at the whole idea of surfing the Net on a TV screen, but it did get a lot of people online who couldn’t afford a proper PC (or who didn’t want to deal with one), with its subscriber rolls topping out around a million when Microsoft snapped it up in 1997 and renamed it MSN TV a few years later. Fast forward to 2004 and Microsoft’s new MSN TV2 Internet Player can still do dial-up, but they’ve added an Ethernet port and are positioning it as a way to get online for the 51% of Internet users who do have a broadband connection but don’t want to spring for a second PC just so they can check email and read websites. Better still, it can pull double duty as a wireless media adapter that can stream audio and video from the hard drive of your PC to your home entertainment setup."
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I'm not sure that these "WebTV" are really sellable anymore, but I think Microsoft has finally created a unit that might be usable. With USB, support for broadband and WiFi (using USB WiFi adapter) and support for the latest WMV/WMA and other Microsoft standards. The only missing parts are support for bluetooth and flash memory readers. Don't look for a hard drive because this unit is running windows ce, so you'll need to stream your files from somewhere else.