Google has unveiled a series of image and video mock-ups of a tablet PC based on its Chrome OS, the still-gestating operating system centered around its Chrome web browser.

Mountain View uncloaked its tablet “concept UI” early last week – two days before Steve Jobs announced Apple’s long-awaited tablet, the unfortunately named iPad. Google user interface designer Glen Murphy hoisted the mock-ups onto the Chromium Projects site, home to the open source incarnations of Chrome and Chrome OS.

Murphy calls these “visual explorations of how a Chrome OS tablet UI might look in hardware.” With a series a still images, he explores various software keywords, tool menus, and application launchers as well as a UI that puts multiple browser windows on the same screen. Chrome OS is essentially a Linux-based operating system that runs a single local application: Google’s browser.

Ha! This Google-Apple war could well be a lot of fun.