When I was going to order my new MacBook Pro with the new LED display, one of the most difficult decisions was the one between glossy and matte display. I haven’t been happy with the matte display of my old 17″ PowerBook, which is almost unusable in outdoor situations. As we have a beautiful garden and camp a lot when we travel, being able to use my laptop outdoors is quiet important. When you search for information and experiences with both display types, you will find a lot of different opinions and usually people love or hate the glossy display. What I did not find was a good real world comparison, esp. in outdoor situations. I took the chance and went for the new glossy display with LED technology and today I compared them both in the real world.
Left: MacBook Pro 15" glossy LED display
Right: PowerBook 17" matte display
Both displays are set to full brightness.
Situation 1: In full sun

Both laptops in the full sun - a tough situations for most laptops. The matte display of the PowerBook is hardly readable while the glossy is still usable.
Situation 2: In the shadow

In the shadow with bright blue sky behind me. Glossy display has some reflexions now but is better readable. Choosing a darker background reduces the visible reflections. Matte display is readable but not usable for activities like image editing (a typical outdoor activity of me when we are traveling).
Situation 3: In the shadow with dark background

Another one in the shadow, now with dark background. The glossy display is perfect, just like indoor. Matte is dull and very sensitive to direct sunlight.
Verdict
I think the results speak for themselves. With this display the laptop actually is worthy being called a mobile computer. Current matte displays will probably perform slightly better as they are brighter than my almost 2 year old PowerBook and some owners actually report that it works good as well in the sun. The few reflections on the glossy display hardly disturb me and by changing position or angle, those can usually easily be avoided.