The new Google+ inspired Gmail theme isn’t the default, but you can grab it right now to see what you think.
We like how it looks, but we don’t like how, because of font size and spacing, you can’t see as many emails on one screen as you could before.
To active the new theme, click the Gear in the top right corner of Gmail and go to Mail Settings. Then click the Themes tab and look at the bottom to find “Preview (dense)” and “Preview,” the two new themes. Even the “dense” theme spreads things out a little too much, we think, but it sure looks pretty.