Maybe your eyesight is a lot better than mine but I can't discern pixels at sub-1080p resolution, especially in a movie where everything is kinda smudged out and individual pixel values don't matter as much.
On Netflix, The Sandman looked abysmally bad at 720p. The complex backgrounds became a garbled mess and the dark scenes were filled with banding.
It's just the shitty compression, not the mark of 720p.
This is extremely evident on YouTube now, for a couple of years if the source content is 4K native, they downgrade it to 1080p (so you can stream it with a comfortable bitrate), but despite a good enough resolution (1080p! 2K!) and the need to just downgrade the resolution (yes, double re-encoding, but) the 2K version looks abysmal. Especially evident on live videos with a contrast lights.
It's a real shame that the same store that sold Blu-Ray players didn't have it and I had to pirate it (and also skip buying the player).