I think a glossy screen in a well lit room will never achieve an acceptable black. I am writing this on a macbok in a room with bay windows and I can see my reflection on the white parts of the screen.
Screens used to have a "quarter wave plate" that would knock down a lot of the reflections -- I'm not sure why the glossy screens came back (more light out? cheaper?).
I have an older MacAir that does not have a highly reflective screen. The black is pretty good.
My feeling is that my eyes are jumping a bit with it, and for this (or some other) reason, I also have a distinct "I'm not remembering as well" underlying feeling. (This could be an illusion, or it could be harking back to long ago when I was trying to learn how to remember more of what I was reading ...)
Glossy displays definitely appear to have more vibrant color in the average big-box store with very diffuse lighting. They are also somewhat better if you can sit so that all of the specular reflections from bright lights will be directed away from you.
I have an older MacAir that does not have a highly reflective screen. The black is pretty good.
My feeling is that my eyes are jumping a bit with it, and for this (or some other) reason, I also have a distinct "I'm not remembering as well" underlying feeling. (This could be an illusion, or it could be harking back to long ago when I was trying to learn how to remember more of what I was reading ...)