As expected the Gmail will get another make over on App the next week of may 2013. These buttons will help the users to make the Gmail experience an easy and interactive one as compared to the earlier versions.
Also that buttons will add the effect of responsiveness to the Gmail which will be very cool. The app allows users to add RSVP and many other things just without penning the mail. Moreover Google has introduced flight confirmation mails that will be telling about the delay time for a specific flight by showing a banner at the top and not asking the user to a down to whats not for the update. More list of features and buttons and the review on the new look would be out soon. Till then stay tuned to GoAndroid.