By not showing the display powered we can make an educated guess that they all have a TN panel with any two or three of: horrible contrast/colors/viewing angles.

 

Ipad 2 has IPS display and it cost $499, so that clearly shows that it's not that there can't be laptops with decent displays, it's simply that PC OEMs were too greedy and got stuck with TN, now that no one of them uses IPS the plants aren't there to do those in volume and any switch from TN would cost a fortune thus being uneconomical, the eventual end result is that everyone will move to Apple because in a personal computer hardware there are 2 things that rule: the display quality and the input method quality.