First photo is my old GPU (RX 6750 XT 12GB MSI Gaming X Trio) that I have sold for 300$ and the second photo is the GPU I want to buy (RX 6900 XT 16GB XFX 319 SWFT) for 385$. I have seen people mentioning the 6900XT is a 1080p GPU in 2026 and isnt future proof for 1440p. I just want good performance for an ultrawide Acer nitro 180Hz 34” 1440p monitor that Im buying soon. Will it be enough or am I looking to be dissapointed with the performance since theres a lot of pixels in ultrawide.   
Half of the time im doing multitasking and studying on my PC and some editing, other half is gaming (GTA V, CS2, Cyberpunk, RDR2…) Will also play GTA 6 when it comes out for PC.

Was this a good buy or am I looking at another upgrade in the future?

PC specs:  
Case: Cougar Uniface White  
Motherboard: AsRock x570 Phantom gaming 4  
SSD: 1x Kingston 960gb NVMe, 2x Kingston SATA SSD 960gb  
RAM: Kingston Fury Beast 32gb (2x 16gb)  
CPU: Ryzen 9 5950x  
CPU cooler: Cooler Master Hyper 212 Black X duo  
Case fans: 5x Arctic p12 psw, 1x Cougar fan  
New GPU: RX 6900 XT XFX 319 SWFT  
PSU: BE QUIET! Power Zone 2 850W  
ATX3.1 Platinum

Old GPU: RX 6750xt MSI Triple Gaming

Current monitor: 1080p 24” AOC 165Hz  
Future monitor: 1440p 34” Acer nitro 180Hz

Upgrading from an RX 6750 XT to an RX 6900 XT