IllumiShare, from Microsoft Research (also responsible for holodesks), is a system to allow two people to interact with various objects remotely. It gives cooperative activities like taking notes or creating documents a physicality: You're not typing in Google Docs, you're actually writing with ink and paper. Or playing cards with real cards, only your partner is on the other side of the world.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.