Offscreen Tabs may be one of such features. Here is an example visualization.

I am not surprised with the ability of Google Chrome team to come up with interesting new ideas and implement them faster than any other browser out there. They have a very big team of engineers and backing of Google, the giant.

I want one!
The chrome.experimental.offscreenTabs.* API module would allow for displaying and interacting with web pages without having to create visible tabs for them. This is useful in situations where the extension may want to show multiple web pages on the screen at the same time.

Example applications might look like the Safari’s “Top Sites” or Chrome’s “Most Visited” page augmented with real-time display updates and user interaction. In combination with WebGL and its texture API capabilities the offscreen tabs module could be used to create true 3D browser environments on the web!

With this new API, developers will have more opportunities to play with the browser UI. The real-time display could be achieved by updating standard HTML or elements while capturing snapshots of offscreen tabs with the toDataUrl method.

via François Beaufort