Thursday
For some reason, the Google TV Streamer has overscan issues when it's connected to an LG TV.
The TV has the overscan setting set to "Automatic" but the Google TV Streamer is unable to detect this setting and it's cutting the edges of the screen.
The only workaround at the moment is to set the overscan setting on the TV from "Automatic" to "Activated" so the edges don't get cut anymore.
Other Android for TV devices connected to the same TV don't have this issue at all.
I hope this gets addressed in a future firmware update.
Thursday
Confirming the above. Using the Google Streamer connected straight to a LG Oled G4.