Currently running 3440x1440 Ultrawide @ 100 Hz. I think the Valve Index is the more demanding component in that regard, however.
The 2080 Ti build would have a i7 9700k, an Asus Z390=A, 16 gig of RAM, and a 1TB NVME SSD, a cheap $70 case and a 750w PSU.
Stepping down to a 2080 Super would...