What KN65 said, once 3d scanners are down to $1000 and are capable of scanning the dimensions of a human head 50cm x 50cm, I'm talking 'Perfect Fit Technology', PFT here, then this very futuristic name will be das bomb in the realms of, 'Smart Headwear'. This concept can and is being done now with Homebrew 3D Printers. It is the 3D Scanners we crave.
As is undeveloped $250 - $1000. pfft.
Reg this one for 10 years and tuck it under your bed next to what ever else you stash under there.
Regards.matt