If you hangout on Vudu forums you might already know I have been trying to keep an updated list of titles that HDX at Vudu, but 4K UHD at other providers.
I am only listing titles that are 4K UHD at Amazon, FandangoNow, Google and iTunes - mainly MA providers. I don't know much about Microsoft so I haven't even began to include them.
I am thinking of adding in if the title is MA so others know if they upgrade it will port to Vudu (eventually).
If you know a title that should be added, or something that should be removed from the list, let me know.
https://docs.google.com/spreadsheets...it?usp=sharing