At a recent meeting, we had to play 'pass the cable' to connect different computers to the beamer.
I now have a wireless printer (Canon i5200R) which allows me to connect either computer to the printer without cables - it's just added to the wireless router's client list. And very good it is too!
Perhaps soon there'll be a beamer which can be connected to a number of computers through a wireless router? Or even just a flatscreen monitor which can be connected wirelessly?