10 September 2020
UPDATE (September 24th, 2020):
The upcoming Google Chromecast for Android TV retail packaging has surfaced in a leak. The front side of the box has a big "G" logo along with partial images of the dongle and the remote control. There are also a bunch of logos showing different apps and services supported on the dongle. There is "Hey Google" branding on the side and the backside shows the dongle connected to a TV.
Original (September 14th, 2020):
Google is widely rumored to be working on a Chromecast dongle internally codenamed "Sabrina". It is speculated to hit shelves under a new Google TV branding. The dongle listing has been spotted on various U.S. retailers and most recently, Android Police's Artem Russakovskii has tweeted that Sabrina has been listed on Target's internal system.
As per the tweet, the listing reveals that the dongle has been referred to as Google Chromecast with Google TV. It is likely to be the official product name once it becomes available for purchase. The listing further mentions the dongle pricing to be $49.99 which is in line with the previously rumored price point of sub-$60. Lastly, it has mentioned the released date as September 30th.
Now Target's internal system dropped Sabrina's the price to $49.99 and renamed it to "Google Chromecast with Google TV" (not Android TV), giving legs to May's rumor from @9to5Google about the rebranding of Android TV back to Google TV (https://t.co/HV1rfeo4bK).— Artem Russakovskii (@ArtemR) September 12, 2020
It speculated that with the release of the Google TV dongle, we will get to see a completely revamped Android TV UI as well. It seems like Google is working on fully-fledged redesigning Android TV branding. In terms of features, there is likely to be support for 4K HDR and Dolby Vision display quality technologies.