I was just wondering if I could make my shield tv 2017 as my default media player (including my local media). I currently have ps4 as my Blu-ray player, but if I get a drive that supports 4k Blu-ray disk then could I use shield for 4k Blu-ray player.
You might be able to cobble something together with Kodi (no promises there) but you're going to have a lot of trouble (if you even manage to get it working at all!) playing any commercial titles as they have encryption which needs to be removed in order to play and usually that requires special blu-ray decoding software on other platforms (PowerDVD on Windows for example)