[aidenn0]

With approximately 90% of the HT setups[1] I have seen, I can downscale a 4k video to 1080p and have the owner of the HT setup not be able to successfully ABX the difference.

1: I'm using the term "HT setup" rather broadly, as the primary location in a residence for watching movies as a group; it includes e.g. people who don't own a TV and watch movies on their laptop sitting on a coffee table. Setups where the display covers over 40% of the FOV (where 4k definitely makes a difference) are somewhere in the top 5%.