Belkin didn't have a working demo, but did have prototypes of its recently announced ultrawideband (UWB) based USB hub: The hub comes with a USB 2.0 dongle that plugs into any USB port and bridges to the USB hub within a few dozen feet. No special software or drivers is required to use either the dongle or the hub. A Belkin spokesperson at CES confirmed that these devices will run at 110 Mbps, with future models reaching the full 480 Mbps of both UWB and USB 2.0, and that they are sold only in matched pairs.
The matched pair issue is a small problem because it means that you cannot have multiple dongles associated with the same USB hub (which might confuse USB devices, but could work like a USB switcher, too), nor can you associated multiple hubs with a single dongle, nor mix and match hubs and dongles. This will change in future releases, I'm sure, as all of the UWB vendors interested in USB 2.0 replacement want to offer users as much flexibility as possible.