Not near perpetual motion, as others have said. Just an efficient bearing.

For the simply supported structure that would be a Razr laying on it's back, the underside would be in tension for a load applied across the face. As you said, Kevlar has excellent tensile strength (making it hard to stretch). With the Gorilla glass being hard to compress and the Kevlar being hard to stretch, it seems…

VOTE: Sumopaint, though it's admittedly the only one I've used.

I have mine routed to the apple key. I have a Logitec Mediaboard Pro bluetooth keyboard (the one for PS3) without an apple/widows key, so this allows me to use a $60 keyboard with trackpad just like a $150 dinovo.