I'm patiently waiting for a commercially available cyberdeck (or kit). This website doesn't have pricing or order information, just a neat render. Not sure about the buttons though, they look spongy.
Why wait? Buld your own from old and discarded tech. Get a 2008-era intel atom netbook, discard case, mod it, run OpenBSD. Strap to you wrist, run a powercable up your arm to the car battery or a ducktaped brick of D cells in your bagpack.