As an update to previous comments, I got really lucky and also decided to splurge recently on my first OLED PC monitor. I found a LG 27GS95QE-B.AUS as an open box at my local Micro Center, and that week they were running an additional 10% off monitors. After tax, I was out the door for around $590. At this price point, it was worth it to me to upgrade.
Money comments aside, I do absolutely love that this monitor has true HDR and VRR on the HDMI 2.1 input, as I have a PS5 at my desk. One feature I really love not related to the video output is the optical audio output. This greatly simplified by audio hookups from my PS5 + PC to the Bose soundbar I'm using for non-headphone listening. Lately I've been playing a lot of Diablo 4. The video output for a game like this one that has lots of dark backgrounds clashing with flashy spells, fire, etc. just looks phenomenal. It was really, really good on an IPS screen (equivalent to the one on the left in my picture), but it just pops now. At the end of the day, it's definitely the best monitor I've ever owned bar none. It's also nice to not have to compromise on visual fidelity or lack of VRR with my PS5, as I wait to rebuild my home theatre in my current house using my previously mentioned (in this thread) LG 77in OLED with VRR support. One last comment, in terms of brightness, even in a well-lit room, the brightness is more than sufficient for any work being done. In fact, at least the perceived brightness is so good, I actually turned it down quite a bit to match my IPS monitor, as I found it too bright for working with something like an entirely white Excel spreadsheet (I use this setup for working from home too).
Left - LG 144Hz, IPS 27in 1440p
Right - LG 240Hz, OLED 27in 1440p
Edit - To piggyback off the OPs percentage better metric. I would say 25-30% better visuals at 250-300% of the cost with SDR material, and probably 50% better if it's truly HDR enabled material. I wouldn't quite say it's a night and day difference, but it's absolutely a noticeable one! For my specific usage, the bump to true HDR and VRR for my PS5 gaming and simplifying my audio connections was a large deciding factor on the value proposition. Would I pay $1000 (MSRP + tax) for the upgrade, no, but clearly I was in at $590.
