Glossy notebook displays
There are two kinds of modern notebook displays, anti-glare and anti-reflective. Anti-glare screens have the traditional matte finish while anti-reflective screens have the newer glossy (reflective??) finish. There's much debate over the merits of one type vs. the other, especially in the Macintosh camp. Apple's new MacBook is their first product to employ an anti-reflection display.
My Alienware Sentia has an anti-reflective display and I love it. To some degree it's a matter of personal preference. Both types of display have their pros and cons.
Ali and I were out on the deck the other day, me with my Alienware and she with her ThinkPad, which has an anti-glare display. She was forced to go indoors because she couldn't see anything on her screen. I could see mine well enough to work, which is really all that can be expected of current LCD technology.
Anti-glare screens attempt to reduce reflection through the use of a rough surface which diffuses incoming light. This unfortunately has the effect of reducing overall contrast because the images coming from the display also get diffused. Colors tend to have less saturation and blacks are more like dark greys.
Anti-reflective screens address the problem of diffusion and color saturation. Colors are vivid and blacks are really black. Despite the fact that you can effectively use the screen as a mirror, much less light is reflected than that in an anti-glare display.
Anti-glare screens are best for those who use business applications and work indoors. Anti-reflective screens are better for visual designers and multimedia applications. They also seem to work better outdoors, although by a slim margin. In addition, higher-resolution displays will benefit from anti-reflective technology due to the lower level of image diffusion.