A Pin features has been introduced in place of Stars, This features would let you to drag and highlight an email at the top of inbox.
The major changes has been made to its layout as whole layout has been changed. Layout shows the interface will be clean and quite simple. all the option like Inbox, Sent, Drafts is slightly on left site of the screen. The filtering emails group have added with the following social, promotions, forums and updates, Gmail adds tabs for travel, purchases and finances.
Additionally, on the bottom right side have the small circles like button which contains more option in it as a quick prompt to compose mail, reminders and create a to-do list.
It is not clear that the redesign will be rolling out for web version also. There no such announcement or news from the Google side about the new design of the Gmail, may this design is true. If it's true then Google won't spend much time on these updates. As we have regularly seen that Google and Facebook regularly gives some change to its products or adds new features on itself.