Are there OLED panels available with this size and pixel density? My understanding is also that OLED panels currently can suffer a bit from burn-in, or at least color stability problems, which is a no-go for reference monitors.
To me this looks like a overengineered consumer device, with insane macro-scale part count and failures/uniformity issues just waiting to happen. Besides local contrast issues with in a LED driven pixel area and the borders between them. You can do this, but comparing it reference class seems quite the claim to live up to.
The $40k Sony device mentioned is OLED btw.
https://www.apple.com/105/media/us/pro-display-xdr/2019/1e43...
...and it still burns in, degrades, etc. It's not supposed to show a desktop.
Even with a replaceable panel, it would be a very costly affair. LCD panels are mass market products, even if they happen to be (cut as) 6K or 8K.