Google is apparently testing a new tablet interface, according to a video by tecnonet. He captured three different tests on the Google Tablet search interface: (1) new search tools, (2) light blue colored titles and (3) orange URLs.
Here are static pictures of the color changes followed by a video showing the search tools option test. As always, Google is regularly running numerous tests to its user interface and not all of them get approved for wide rollout. Google users may see as many as 12 tests every time they do a search.