"As always, opinion will de divided on this issue - glossy screens are better for watching video while matte screens are less reflective."
I have never come across any divided opinions on this. Even if you are watching video, unless you are in a dark room, all you can see is what is behind you reflected on the screen. Even if you are in a dark room, you have to be careful where you look otherwise you see your own reflection. (I don't want to see my reflection, there's a reason why I am always on the other side of the camera!)
Anti-reflection screens only give a lower resolution and image quality if the anti-reflection finish is because of a rough finish that would make a cowboy builder blush.
Samsung get my vote for not going with the mirror screen.