Hi. I actually considered this myself. However through more thorough research, I found that most of the software used for Sixth Sense technology runs best on Windows 7 or less. Unfortunately it's very hard to get Windows running on a RPi unless using a virtual machine, and even then it runs extremely slowly (often taking 10s of minutes to boot).
If anyone else can suggest another mobile computing device (Preferably pocket-sized or similar), that can run Windows 7, I'd be very appreciative.
Sorry that I couldn't be of much help.