It'll be great for CAD. Instead of having a 3D model of whatever it is you're designing on the screen, you could have a life-size projection right there in front of you.
"The only purpose for which power can be rightfully exercised over any member of a civilised community, against his will, is to prevent harm to others...in the part which merely concerns himself, his independence is, of right, absolute." - John Stuart Mill, On Liberty