Google has created new display sets for application Gmail Web. The updated version it includes all the Emojis that exist in Android and Hangouts, and which until now you have not been able to use in your e-mail on the Web.
This is changing from today as mentioned above with the Gmai | update. So you can use the same Emoji in Hangouts.
But in addition to the addition of Emoji, the new Gmail for Web comes with hundreds of new themes (themes). analysiss.
In addition, you can edit the subject yourself, or create your own one entirely.
Another addition is a choice between bright and dark subjects.
If you want to see the new additions you can do it from the link below.
If you don't see them yet, Google has said that the update will roll out to everyone on duration of the coming days.
https://mail.google.com/mail/u/0/?pli=1#settings/themes