Don't get me wrong, I'm all for the 4K/UHD format;Truthfully I dont see why any film no matter how old can’t transition into 4K UHD.
Both were shot on 35mm film and would be native 4K not upscales.
Also imagine classic black and white films in 4K most lovers of classic cinema can tell you that many black and white films look more stunning in HD than something jisy made recently in color.
Add to that a title like Wizard and Gone both have been re-issued to death on all formats so far its only a matter of time before WB transitions them into 4K.
but better, more qualified people could technically explain why this may or may not be so.
Hope you're right, though.