Vision Pro is 4x the resolution of this and is 100% suitable as a monitor replacement. Not what you asked, but maybe provides an upper bound?

90% of screen door effect disappeared when we switched from pen-tile OLED to ordinary RGB matrix.

The remaining 10% still remained with the HP Reverb and the Pico 4 which I've used quite a bit, so it's not a solved issue but it's a world of difference from the old Vive or Quest 1 if that's your reference frame.

("pancake lenses" is a similar upgrade over the old fresnel lenses)

It's around what the Quest 3 has. There is no noticeable screen door effect on that headset. Since you can make the monitors as big as you like, you could do a multi-monitor setup, maybe. ... as someone who uses VR pretty heavily though, I'm not sure I'd personally ... want to?