Dr. Raymond Soneira of DisplayMate—the guys who do those absurdly detailed display tests—wrote a great article for Gizmodo (if you can believe that) about some of the most over-hyped display specs:
Most HDTVs, tablets, smartphones, laptops, and monitors prominently list their display specs as a sales and marketing tool. Unfortunately, many of these specs are misleading, and are misunderstood by both consumers and professionals. This makes it harder to figure out which displays are really better. Below are many of the specs you’ll see together with brief explanations that will help you understand what they actually mean.
I was reading Dell’s marketing page for their 27-inch display the other day and was blown away by the extra-large colour gamut, 80,000:1 contrast ratio, and “billions” of colours. I thought some of those figures seemed like marketing puffery, and that’s indeed the case.