New Gmail interface leaks. Is it true?

Gmail is one of the most used email app on Android, and we've seen it undergo make overs and such, and again .. it going to have another.

The new Gmail interface.

Yoel Kaseb posted this image on Google+, and it does bring a new look for Gmail, for the tablet for now at least. You would notice the Circle + button on the bottom left of the screen, and the rest kind of looks like the same, there is also a change on the icon if you would look at it closely. Is this a hint that there would be a user interface change on the next version of Android?
Lets just wait for it to be released and see what Google has for us in store.