And OLED display might be a decent upgrade, but I'm not holding my breath for a Steam Deck 2. Plus I'm like 95% sure if an upgrade comes, you can just swap the new display yourself, like you can do with every single part in the Deck right now.
Heat and noise reduction is mainly what I'm after though. I really, really don't like it when portable devices get hot or make significant amounts of fan noise.
Longevity is really not a concern with the types of OLED panels we're talking about. (It's more of a concern for the technology LG puts into their TV W-OLED panels, but those do not exist in handheld sizes.)
I have not seen a single report of anyone experiencing burn-in on the Switch OLED outside of this extreme, unrealistic test. I also haven't seen anyone who owns a smartphone report that their smartphone had burn-in since many, many years ago, even though there are plenty of static elements on a smartphone screen, including the wireless signal indicators. QD-OLED would be nice, but it is absolutely unnecessary for longevity based on the available data.
Switch OLED is also incredibly nicer to look at than even decent IPS panels, let alone the Steam Deck's current awful screen.