That more pixels on the screen can cause people to return the laptops. Many owners can't dive into windows to push the display font sizes up and end up with tiny screen fonts. After suffering many returned laptops, it's good to read the makers have learned the lesson.
As to the GHz rating, you may have missed an article about how the Centrino executes about twice as many instructions at the same clock rate. Hence the clock rate can be lower, give more performance and ... give better battery times.
I have a Compaq Evo N800c laptop at work that is 2-years old. It has a Mobile P4 2.2Ghz processor with a 15" non-wide screen with a max resolution of 1400x1050. I have an old PIII laptop I am replacing, but it seems new laptops have Intel processors under 2Ghz and ones with 15" non-wide screens only have 1024x768 resolution. Am I missing soemthing here, or have we digresssed in laptop specs?