The 4k streaming copy of the film has stairsteps though. Like it's been upsampled. I'm sure their software can render at 4k but they choose not to for whatever reason.
probably. Looking at streaming 4k is just sad, as this is just wasting money (on devices and bandwidth) for marketing having abyssmal quality at 10-20Mbit/s. With a FHD-bluray weighing in at 30-50MBit/s that's nothing to wonder about though I guess..