@n7: I have a Toshiba laptop (Satellite P500) with a 18.4" 16:9 display and once you get used to it, it's just as good as the 16:10; there's nothing wrong with 16:9.
Nope. I work on hundreds of different 16:9 displays every year.
16:9 almost always comes at the expense of vertical viewing area, & a 2560x1440 display is yet another one of these scenarios.
You lose 160 pixels of height, with what gain, a stupid 16:9 ratio?
The same nonsense argument was used for 16:10 vs. 4:3, as basically the same thing happened.
You got way less vertical pixels & instead got more horizontal ones.
Now that said, for very large display widescreen of some kind is no doubt basically imperative.
But the whole wider & wider & likely 2.35:1 garbage we'll be seeing in the future is downright ridiculous.
For TVs/projectors i can see the appeal of wider & wider widescreen.
Doesn't make sense for PC use after a certain point though, & we've already reached that point IMO.