Last week Samsung released several videos that showcase its latest Super AMOLED displays. The videos shows what looks to be an actual upcoming phone with almost no bezels on the sides and no physical buttons on the front:
This design has been suggested (leaked?) before for Samsung's upcoming flagship, the Galaxy S8. Samsung is expected to reveal the S8 soon, at the MWC 2017 event (February 27th). Of course this could just be a concept handset created for the AMOLED video, but it could also be Samsung's actual new phone that was added to the video by mistake (or not by mistake).