I limit the discussion to the tablets.<p>First of, reflections distract. If I see a movement, my instinct is to focus on the movement. I do not want that. I want to focus on what is on the screen.<p>When laying on the table, a reflective surface shines an overhead light source into my eyes. This forces me to carefully position the tablet when not in use. I do not want that.<p>Reflective surface will mirror my face, I do not want to be constantly conscious about my presence.