A:AnswerYes but I believe 4k blu-rays play at 60fps/60Hz which the HDMI 1.4 30fps30Hz input on this specific monitor will only do on its Display Port input which no 4k Blu-Ray player has as far as I know they are all HDMI 2.0. It is some kind of industry standard thats being used now. You will need a monitor or tv that has HDMI 2.0 input to fully utilize a 4k blu-ray players quality. Believe me you want a screen that does at least 4k 60fps/60Hz because 4k at only 30fps/30Hz looks terrible and is noticeable.
A:AnswerYes. The display stand it comes with uses the standard VESA holes to mount to the monitor and can come off quite easily if you with to wall mount it or not use it on a desktop.
A:AnswerMatt almost zero reflection which is great because I have a very bright monitor right next to it at an angle which would horribly reflect into it if it wasn't Matt/non-reflective