well,glossy screen can provide more vibrant and cleaner images, but of course you will see light reflections and prone to finger print and dusts, meanwhile matte screen images are more grainy (if watched really close, much more obvious with matte screen protector) and blurred out the color. it just a matter of preference, i willing to sacrifice some picture quality with matte screen and also big screen with glossy screen is too annoying for me.

anyway, alot led backlit lcd tv are now using semi-gloss screen nowdays that take the best of two world (reduce reflection (just not as much as matte screen), provide vibrant image and cleaner image, and i believe desktop lcd monitor will starting to following suit as well, just hope that i can be implemented on non-touch screen notebook as well.