I spent a few hours today editing the photos I shot at a product launch for a Finnish client last night.  The product in question was an enormous, interactive videowall, packed with lots of clever technology (if you'll excuse the anthropomorphism) that does different things when different objects, including fingers, touch it.  You can also plug in other devices, so if you win the Lottery and would like to play Super Mario Kart in a go-kart that's the same size as you are, please send me an email for the contact details.