It's an HD 55" OLED display in front of you, effectively.

Do you need to move them up and down the bridge of you nose to focus them?

No, they're always in focus, more or less. The edges aren't comfortable to look at, which is uncomfortable when you're on Slack or chat apps, where lots of the action is on the edge, but they're fantastic for games, movies, webpages, etc.

I've got the Viture Luma pros and the quality is great apart from blurriness in the corners, but the perception is more like holding a tablet inches from your face rather than sitting in a cinema

Well you hold a micro tablet an inch from your retina, don't you.

There is something about distance which we can't fool our brains about (yet), I can watch something on 42" screen 1m from me or on 75" screen 4m from me, that big screen, despite visibly smaller makes somehow more 'wholesome' experience.

I have the xbx a01+. It's still OLED but the color to me feels more like a traditional LCD panel, not as vibrant as a typical TV with cranked up saturation etc. I won't say it's "washed out" but the dynamic range is not as high. It's perfectly usable and sharp enough for regular work though IMO. With mine being 1080p I can see the individual pixels though.