It comes in two flavors; an ultra-slim "Touch" version, which uses "unique pressure-sensing technology that senses your typing as gestures," and a "Type" cover, which is more traditional with raised buttons. The Type cover is, predictably, thicker than the "Touch" version by 2mm since it contains real keys.
The "Type" keyboard doesn't seem to have enough thickness to register keystrokes, while the "Touch" keyboard eschews the traditional clickity clack of a raised keyboard for pressure sensing technology – and I'm not sure that's a good thing. I don't see either of these keyboards as a satisfying replacement for my laptop's. Do you think this keyboard will really be able to replace a full-fledged laptop keyboard? And, if not, what are the implications for Microsoft?