Movie would have been rendered at 2k (maybe 4k but that's still rare). GPU's still don't cut it for high-end VFX/Animation rendering, as you're always memory /

Movie would have been rendered at 2k (maybe 4k but that's still rare). GPU's still don't cut it for high-end VFX/Animation rendering, as you're always memory / IO bound, e.g. reading in +20GB geometry and >200GB textures for an average large scene. That doesn't fit on a GPU and copying stuff on-and-off over PCIE is really slow. Generally you get the geometry in memory (so 20GB in memory, + stuff like acceleration structures) and page the textures with 10/20 GB texture cache sizes. A dual high-end Xeon can almost compete with a K6000 at raytracing, and copying stuff in and out of memory is much faster. Then you're just limited by network bandwidth / latency.