I've been keeping an eye on 1440p stuff and from 2025 through 2026 there are quite a few examples of them getting more image quality related features. Basically catching up to what's been what's been happening with the 4K OLED stuff along with some other new features to boot. Sad part is that while 8 GB will suffice for many games at this resolution but there are certainly some AAA titles which will happily use 12 or 16 GB if the card has it to offer. However, there are some very cool 3rd and 4th gen 21:9 models out and on the way.
1080p panels has seen some improvements as well but I have noticed more effort has been put into to getting panels with insanely fast refresh rates which means as long as the system is overall fast, 8GB is perfect for those panels. It seems like the refresh rate angle is the larger focus for display manufacturers with the non-stop swath of 27" 1080p monitors.