Apparently the PS Portal screen is laminated, so I'm assuming having a laminated 1080p LCD panel isn't an issue of cost.
That would make a fairly big difference for me. I obsess over the inky blacks of an OLED but I would be satisfied with the LCD panel with (1) slimmer bezels and (2) laminating the display. The absence of these were my two main issues with the Switch LCD.
non-laminated vs laminated
I just bought a modded Game Boy Color and had the option of laminated vs not, I didn't really know what it meant at the time but I went for the laminated display and it looks
stunning.
Despite my personal gripes with the Switch LCD screen today, I remember it being well-received at the time and I agree, it looks comparatively worse than the OLED to me but I never considered the screen to be cheap or terrible on its own.
And I would expect a 2023 LCD to be better, anyway.