Google shows off a concept of how a Chrome OS tablet UI might look like on the company's Chromium Projects blog. A video can be seen at Engadget.
* Keyboard interaction with the screen: anchored, split, attached to focus.
* Launchers as an overlay, providing touch or search as means to access web sites.
* Contextual actions triggered via dwell.
* Zooming UI for multiple tabs
* Tabs presented along the side of the screen (see Side tabs)
* Creating multiple browsers on screen using a launcher