The first OLED monitor for the public was released almost 4-5 years ago, yet prices have remained stagnant for the past years. There has been no price evolution whatsoever. Every year, I consider getting one, but I change my mind when I see that prices have sometimes even increased in the meantime. It seems odd to me. I would expect an increase in production of these panels over such a period.
The prices of these are dropping pretty regularly. I believe there was an AW3423DW for less than $800 just yesterday.
In general though, the technology they’re using for these panels are constantly improving. The OLED panels of today are much better than the OLED panels of 5 years ago, whereas LCD panel technology has mostly plateaued (can’t think of any exciting new improvements here).
“IPS black” seems to be a good improvement, but IIRC there is only one IPS black monitor with above 60Hz refresh rate and it came out last month.