Google is constantly upgrading Gmail since the last one month, voice chat and video chat have already been added to the Gmail, now 30 new themes are added to Gmail allowing the users to add a little personal touch to their inbox.
Anne Chen from Google describes the latest update stating:
There’s a shiny theme with chrome styling, another one that turns your inbox into a retro notepad, nature themes that change scenery over time, weather driven themes that can rain on your mailbox, and fun characters to keep you in good company. There’s even an old school ascii theme (Terminal) which was the result of a bet between two engineers — it’s not exactly practical, but it’s great for testing out your geek cred.