Would you like a working Tricorder?

I love this new xPrize competition to create a real life working Tricorder as inspire by Star Trek.  In many ways of course the iWatch and similar devices are already starting to evolve almost beyond the Star Trek Tricorder, after all in Star Trek these devices were only used by science and medical staff, not worn by everyone.  Never the less a device that can perform a bank of medical scans will save millions of lives in remote parts of the World.