This could be the Google Pixel Stand - a new accessory for the Pixel 3
(Android Central)

It'll charge the Pixel 3 and turn it into a mini Smart Display. Google's October 9 event is quickly approaching, and to literally no surprise at this point, the Pixel 3 and 3 XL will be the stars of the show. To go along with the new phones, Google appears to also be working on a new charging stand accessory called the Google Pixel Stand. The folks over at 9to5Google got their hands on a short GIF showcasing the Pixel Stand, and while it doesn't reveal any specifics about the mystery product, there are a few key details we can pick out from it. The stand itself appears to have a circular base that the Pixel 3/3 XL docks into. Based on the charging indicator in the photo and GIF, it likely docks into the stand via USB-C so it can charge up while connected. The GIF also shows various slides of different photos, indicating that the Pixel Stand will kick the Pixel 3 into a Smart Display-like interface to show pictures, weather, calendar appointments, and more. We don't know how muc...