One of the most promising things I saw at CES was a small group of companies aligned in their effort to create wireless USB. Their plan is to use UWB (ultra-wideband) at 480Mb/sec to create a secure system for replacing USB and FireWire cables. This diagram summarizes the idea:
According to the folks at the booth, the first products should start appearing at the end of 2005, and things will really ramp up in 2006. You'll take your new printer out of the box, you'll plug it into the wall, the computer will discover it and it will start working. If it really turns out that way, it will be awesome.
See MobilePipeline: Ultra-wideband to learn more.