Google today released an update to Inbox by Gmail that includes the direct share feature for devices running Android Marshmallow and above. People that you email the most will now be listed at the top of the sharing list so you can quickly send them stuff without first opening the Inbox app. Again, a very nice feature that will likely find its way in other apps as well and may bring a crowd to the sharing list. Only time will tell.
Download the update for Inbox by Gmail in Google Play Store.