For what it's worth, marketing firms have been encouraging folks to interact
with billboards and the like with their cellphones for some time now
, but prototype software developed by gurus in the UK has enabled a cameraphone to control a desktop computer. As expected, the application enables users to "move and manipulate onscreen items simply by waving a handset around in front of a [display]," but giving mobile owners a second-rate 3D mouse is just the beginning. There is promise for it (or something similar) to one day be used in more public settings, but while it's still locked inside the house, we'll probably just continue using our entirely more comfortable Wiimote
for any atypical mousing exercises. Hit up the read link for a video demonstration.