I wonder if it will make much of a difference. I have my doubts that 4k will yield much of a jump, but perhaps HDR on supported displays will make the colors even more vibrant.
The bonus content sort of stinks though. I understand that a couple of them share holiday tie-ins and I'll give those a pass since they're logical additions on that basis, but couldn't they have cherry picked some highlights from the catalog to fill the other slots?
Seems clear we won't see the decades collection get the Blu-Ray treatment, so it seems a shame to see the space dedicated to something like 'It's Flashbeagle, Charlie Brown'. I doubt that tops any fan's wishlist for what they'd like to see be given premium treatment on UHD-BD.