I bought the current one about a year ago and a few weeks ago picked up a Samsung 32" G80SD (4k, 240Hz, HDR) that I run from my Mac via HDMI (and on a Windows PC via DsiplayPort) side by side next to the Studio Display.
Apple put themselves in a hole here as the MacBook can drive the G80SD at 4k w/VRR or 240Hz, desktop swipes, window animations, even YouTube all look more natural on the G80SD vs the Studio Display.
The Studio Display has better color accuracy and pixel density, which assuming Apple would want to keep, really will cap their refresh rate ability vs the competition. That being said if you're Apple only it'll feel like a nice upgrade, albeit at a cost.
Personally I like having both ecosystems feel natural, so I'd probably even upgrade to a new one to replace the current one and have it ride shotty next to the G80SD. I like having both I seem to do a decade with dual screens, a decade without and now starting a new one with two, we'll see how it goes.
As an aside I wish Apple & Nvidia would make up, M4 tech is great but its not like Nvidia is going to slow down anytime soon and I don't think Apple has an answer for hi-res / VRR / anything over 120Hz at 5k+.