Google recently announced that they are making changes to the “compose email window” in their webmail interface. Beginning November 20th, this will be an “opt-in” change meaning you can choose to switch to the new look now, and switch back to the old look if you don’t like it, but the new “compose email window” will become default beginning in early 2013 with no option to switch back. Below is a video tour of the new interface:

Here are some additional links for more information: