My Shield TV has auto-updated to the latest version of Android Home by and it looks like the Google W**kers have decided it isn't bad enough forcing you to watch 2 ads every 2 minutes on Youtube…there are ads now on the Home screen. This is apalling - because it doesn't let you change to a clean interface on the home screen - on a device I've paid good money for and would never have bought if this was the deal. I have already solemnly sworn not to buy anything advertised on youtube:).
Anyways for anyone interested…it is possible to get rid of this by Uninstalling Android TV Home updates - though I never allowed auto updates in the first instance. But it looks like the evil money grubbers will close that loophole in time.
Get a Pi-hole setup and never worry about ads again.
https://pi-hole.net/