The X PRIZE Foundation and Qualcomm are partnering to try to make the Tricorder—Star Trek's famous health-diagnosing gadget—a reality. They are offering up $10 million in purse money. This may be the most practical X PRIZE yet.
The gadget that takes the X Prize must enable a person to accurately diagnose themselves (without going to a doctor or hospital) and it has to be "easy and fun to use". This is one piece of sci-fi that I can't wait to have as a reality, and I think the rest of the 99% are with me on that. Get to it, geeks!
Image credit: The RPF forums