Are you actually streaming it in 4k right now? Every other account I’ve read from the Netherlands is that they’re marking things as being available in 4K but none of the content is actually encoded at that level. If you’re getting an actual 4k stream and not a 1080 stream marked as 4K, it means they’re already starting to update/upgrade the files they’re serving since the platform went live.
Also, I’m guessing the Ewok movies and show isn’t up there? I have yet to see anyone say they’ve watched them, and considering people are finding stuff like the '90s X-Men and Gargoyles episodes, Ewoks should have turned up by now.
The quality is a lot better than the streaming version I have on google movies, but the most obvious difference is the colors, which have a much higher dynamic range. The Ewok are not available.