He continuously talked about bridging gap between real life and digital worlds. More specifically, it seems that he is interested in controlling and getting information using everyday objects.
Here are some excerpts form his talk.
Low-cost data gloveWhat ever he named it, I call it a low-cost data glove. It’s made of two deconstructed mice.
Poor mice dissected
Two mice are collectively transformed into a single data glove
Quickies: Digital NotesThe second project is about digital note taking called Quickies. He showed demonstrations how a user can share, store, and print analogue sticky notes. Fore more information, the project page or following paper will help:
P. Mistry, "QUICKIES: the future of sticky notes," in Proceedings of the 27th international conference extended abstracts on Human factors in computing systems Boston, MA, USA: ACM, 2009.
He also introduced a 3D input pen.
SixthSenseSixthSense is a 3D gestural interface using a small project, webcam, and microphone.
It turns everyday surfaces into multi-touch gestural input pads – the core function of SixthSense. It is achieved by combining image processing and gesture recognition with images gathered by the webcam. You can see four color markers on his fingers. Those explicit markers can help processing algorithms easily figures out a user’s gestures.