If you're genuinely worried about burn-in for work but want to push that 4090, Id suggest looking at the 38-inch Nano IPS panels. In my experience, they provide a more practical immersion level for flight sims than the 34-inch models without the quality control headaches you see with some other brands. The 1600p vertical resolution is a massive game changer for productivity and seeing more of your instrument panel in the air. Ive been using the LG 38GN950-B 38-inch UltraGear Nano IPS 160Hz for a while now and its basically the most stable high-end experience you can get. A few things to consider for your setup:

• Opt for high-end IPS if you leave static windows open for 8+ hours a day. OLED is gorgeous but the anxiety of babying the screen honestly sucks.
• Check your desk depth. These bigger screens need space or youll be turning your neck way too much.
• Look into the Dell Alienware AW3821DW 38-inch WQHD+ Nano IPS. Its G-Sync Ultimate certified which helps a lot with the micro-stuttering that sometimes plagues flight sims when you're flying over heavy scenery. For $1200, you can get a top-tier panel that will last you five years easily. OLED is tempting for the blacks, but for a mixed-use machine, the reliability of a high-end Nano IPS usually wins out in the long run. Saves you the headache of RMAing a panel with dead pixels or weird firmware glitches anyway tho...

Adding my two cents since I've spent way too much time and money chasing the perfect screen for my rig. I actually started with a standard IPS but the lack of contrast in flight sims was killing me at night. When I finally moved to a massive OLED, the difference in Cyberpunk was literally night and day. If you're worried about the 4090 melting, dont be... it handles super ultrawide resolutions like a champ.

• Pixel density on a 49-inch at 1440p is identical to your 27-inch, so it stays sharp.
• Refresh rates are huge. 240Hz makes maneuvers feel way smoother than the 144Hz stuff I used to run.
• Burn-in is manageable. I just use a black background and hide the taskbar. I eventually settled on the Samsung Odyssey OLED G9 G95SC 49-inch 240Hz and tbh it's the only thing that feels like it matches the card power. Colors are way better than the mini-led stuff I tried before.

TL;DR: Go with the Alienware AW3423DWF 34-inch QD-OLED 165Hz. Its cheaper than the super ultrawides and the 3-year burn-in warranty is a lifesaver for peace of mind. I was in the exact same boat when I upgraded last year. I spent weeks obsessing over the Samsung Odyssey Neo G9 G95NA 49-inch Mini LED 240Hz because that curve looks cool but the reports of scanlines and weird HDR bugs really put me off. I ended up grabbing the Alienware instead and honestly i am so satisfied with how it turned out. Cyberpunk on this thing with a 4090 is basically a religious experience... the contrast is just on another level compared to standard IPS or even mini-led. Regarding your burn-in worries, i use mine for spreadsheets and stuff for 8 hours a day before gaming and it hasnt missed a beat. Dell is super good about the warranty which covers burn-in specifically, so that took all the stress away for me. Its way more cost-effective than the bigger screens too. You get that amazing 4090 performance without having to deal with the headache of a monitor that might arrive with dead pixels or weird flickering issues. It works well, looks incredible, and saved me enough money to buy a nice monitor arm. I am definitely no expert on panel tech specs but for a regular person just wanting things to look good without the drama, this was the best choice.