If you're interested in taking the mobile keyboard alternative for a test drive, we'd recommend you head to the company's site now to sign-up.

ENGADGET

Happily, though, Synaptics says that's something it's able to fine-tune, depending on whether a PC maker wants a firmer keyboard or something a bit softer. (We say the market has enough flat, lifeless Ultrabook keyboards, but that's just us.) In any case, we hope to test a more polished keyboard sometime later -- one that has all those additional touch-sensitive features enabled.

ENGADGET: Fingers-on with Synaptics' ThinTouch keyboard for Ultrabooks (video)

Second, newer approaches to CAPTCHA have been developed that try a different approach to a Turing test by asking users to perform operations through input devices, like a keyboard or mouse.

FORBES: Artificial Intelligence Will Defeat CAPTCHA -- How Will We Prove We're Human Then?