I love conducting in-depth analysis of technology; however, the problem with such analytic endeavors is that the deeper you go, the more time it takes to reach your goal.
This is why I'm always impressed with the abyssal depths of analysis DisplayMate's Ray Soneira travels when he covers display quality. In his latest article, the man gets downright subterranean.
Soneira takes the iPad 2, Xoom, and Asus Transformer and completely scrutinizes their screens on the basis of brightness, contrast, color quality, screen reflectiveness, viewing angle, and backlight power consumption. That's pretty much anything and everything important when considering screen quality.
Soneira is a harsh but fair critic and gives a detailed account of how each screen performs comparatively.
It's definitely worth checking out if you're at all interested in tablets or just displays in general. Be warned, it's highly techy--which in my opinion only makes it more appealing--so be prepared to learn a little something.
From my experience, I agree with Soneira's assessment that out of the three tablets evaluated, the iPad 2 has the highest-quality screen. Here's hoping he can add the Samsung Galaxy Tab 10.1 with its PLS display and T-Mobile and LG's G-Slate, both of which should give the iPad 2 a run for its money.