With Indy 5 hitting theaters in July of 2020, I wonder how Paramount will handle the rollout of the first four on UHD. The 2012 blu-ray transfers of Temple and Crusade used the 2008 masters (which showed up as the WoWoW broadcasts around that time), but those were only finished at 2k unless I’m mistaken. Maybe they’ll redo those scans to take advantage of the extra resolution. Raiders was redone yet again with a 6k scan and 4k finish. Crystal Skull was finished at 2k (at least according to imdb), which is too bad but it makes sense considering all the cgi, none of which would’ve been rendered above that resolution.
Most(?) movies are finished at 2k, so this isn’t unprecedented. The real benefit of UHD is the expanded color profile.