Originally Posted by jmpage2
I don't currently own any BD device capable of 4K playback, my question is if I'm spending $400 if there are enough advantages of buying a standalone player vs. a game console that I can use for other things.
Well, that's where you get to make the choice.
It appears that the XBox is capable of handling UHD media pretty well. There may be some issues you need to look up, but if they've already been fixed or don't matter to you... voila' you get an XBox.
If you have other things you want from a player, or things the XBox doesn't do well, like the remote, or network access of video files, etc... Then a dedicated player comes into the picture.
If you really want both a game console AND a UHD player, then the XBox your solution, since the Playstation doesn't have a disk player and won't ever according to their management.
If you want to check out the two in parallel for your uses, buy two and return one. Say a less expensive (LG?) UHD player and the XBox.
As an example, for me, I don't play games but do use UHD disks, bluray, DVD's, regular audio CD's, SACD's, DVD-Audio disks... on my NAS, I have MKV files to watch video, home video and loads of audio files that I play - MP3's, FLAC, etc. So my player has to handle all of that. Iff you don't need that, then the XBox may be perfect and you get to play the games.