actual experience
My cousin has a glossy display and I have a matte one. I placed them side by side to make the comparison. Here are some of the things that I noticed:
Watching DVD's is a much better experience on the glossy. Even photographs seem to look better on the glossy. However, upon closer inspection, I noticed that in order to achieve the bright colors and black blacks, a good deal of detail and color nuance is lost on the glossy. If I had not had the matte screen next to it, I probably would have never noticed it. But having the two side-by-side, the glossy screen definitely loses on sharpness, detail, and clarity.
Personally, I think that the glare factor against the glossy screen is really a non-issue. But the loss of clarity, detail, and sharpness is.
My 2¢ says that if you are going to use your Mac primarily for TV and Films and you are really just an amateur photographer with no pretensions, then glossy is the way to go.
If, however, you are a perfectionist and seriously into photography, graphic design, and film making, then it's definitely the matte screen.