The Zen PC concept has the potential of enabling the millions of blind and partially sighted people worldwide to massively improve their abilities to use a PC. The tablet-like Sandbox PC running the Zen OS allows for users to operate the computer via an active surface that changes texture, displaying text in Braille and producing images and icons that could be felt by the user. It's currently only at the concept stage, but TechRadar will be bringing you regular news updates on this interesting and genuinely useful technology as we get them.