Everyone has a different idea of what fun gadgets they would like to see in the future, and some of Microsoft's researchers have been demonstrating in Brussels what they hope might take off.
http://news.bbc.co.uk/1/hi/programmes/click_online/4534674.stm
Most of them sound pretty gimmicky and the kind of things that have been talked about for years.
Snarf sounds vaguely interesting...
The Whereabouts Clock sounds a bit disturbing.