Glad to hear it looks stunning. I've checked the demo's on ULTRAFLIX.com in 2k and 4k. Even though my monitor is 2560x1600 the 4k looks quite a bit better than the 2k. The 4k has a sound delay and image stutter, but I figured that's my aging computer and NOT UF.
Something seriously wrong with the 2k ROCKY but the 4k version looks great.