Ultrawideband is approaching the market: This report on UWB from News.com conforms with my recent discussions with UWB chipmakers. There are chips at manufacturers who are working feverishly to release products. The first wave of products will be Certified Wireless USB focused, which means that you won't see a lot of video (which will overlay IEEE 1394 aka FireWire over UWB) nor IP networking. The Bluetooth SIG just announced a delay until late 2007 for their application integration with UWB, too.
However, wireless USB should be quite slick. The early devices I know about are mostly dongles and adapters. The dongles will allow driverless replacements for existing USB connections: plug one of a pair of dongles into a computer's USB port and another into a printer's USB port, and you're set. Associating UWB devices together will be a bit primitive at first. You'll be able to buy paired dongles and adapters, and there will be a mechanism to allow you to register dongles to associate together by running software on a PC and plugging in a dongle. This is a one-time operation, of course, and is simpler than Bluetooth pairing--but it's still a little kludgey.
Expect consumer electronics devices in early 2007. Kodak demonstrated a camera that would transmit data to a computer over UWB, but that's not a Christmas product. One firm is developing HDMI interfaces that will allow you to connect an HDTV and another HDMI source as if you were using a high-definition interface cable--a nifty alternative that should appeal to new HDTV buyers.