25, 30, 60 Frames Per Second

On many 1920x1080 and 3840x1920 panels you can only inhibit overscan on 1080i/p and 2160p sources, though it is usually enabled by default.

720p, 576i/p and 480i/p are usually overscanned, and whilst you can vary the degree of overscan, you can often not defeat it.

Many STBs will offer a 576i to 1080p upscale which will allow you to watch 576i sources without overscan - though Sky boxes annoyingly don't properly handle 4:3 576i sources if you upscale (other boxes usually offer a pillarbox option) so this isn't a great option.

Marginally relevant at least connected ....

Having used Android TV for almost a year now, when will manufacturers enable variable video settings for Smart content. My Sony seems to play App content dependent on what input was last chosen externally or from the receiver's own tuner. Annoying at times.

My Sony TV, which doesn't claim to have Android TV and doesn't allow third party apps, but clearly is running Android ICS under the surface if you look at the Open Source software in it on Sony's website, and occasionally throws up very Android UI elements in error, seems to have video settings separate to other inputs - so you have to be within an app watching content to change the settings for the player.

Annoyingly it doesn't seem to support refresh-rate switching though...