IMHO, 1080p is overkill. You won’t hear that from a good number of tech news sites or sales pitches, but it’s true in my experience. That said, 4k is even more overkill. I will not subjugate myself to some new “advanced” DRM just to watch 4k videos. Screw that.
(Although I suppose this rant about DRM is irrelevant since my machines probably can’t handle 4k videos anyway.)