Just tested Dell E5550 vs Zbook 15u g2 for a extended period of time - just out of the box, with no calibration. E5550 had a rather red hue to it and low detail levels in dark colored areas. Letters were smooth but not as sharp as the HP (windows cleartype on both). Slightly brighter than the HP, but only slightly. The Zbook had just a hint of a yellow/green hue from what I consider neutral, but better details in dark areas of pictures and a little more crispness and detail. Personally I would prefer the HP...
Amazing review of some of the best <a href="http://www.laptopscreenshop.co.uk">laptop LCD screens</a out there. It's nice to see someone actually look at the specifics for a change as resolution isn't everything
I love the tests on this site but the way they rank screens remains a mystery to me. They rank them by Adobe RGB coverage while almost all content you ever see is sRGB. Adobe RGB makes sense for photography ... but not when nearly all screens barely brake the 50% level. It would also be wrong to estimate the sRGB coverage from the Adobe RGB percentage because 65% Adobe may represent about 100% sRGB or just about 50% sRGB ... total non-sense in my opinion. Then I take offense with great screen rankings when the screen has too many pixels. Sorry, but Windows simply does NOT work with 4K. If you are not limited to the use of a very small number of programs - like for example exclusively Adobe software you simply cannot work with the sceen without setting it to a different resolution - and that means the screen quality has to be graded at THAT resolution. Also all mirror displays should get at least a 20% setback in that category. Oh yes, the Zenbook 500 is of course missing at the top (as is the ZBook 15 with DreamColor display). One other strange thing - notebookcheck.net systematically gets to different and normally worse measurment results than ANY other review site I ever came across. Over and over again NBC measures less gamut than anybody else. As I'm looking for a display with about 99+% sRGB all this is very annoying.
The LP173WF3-which used in the elitebook 87x0w 16:9 models and Zbook 17 is the best. no grain effect (AG coating is not so strong, very comfortable), no annoying light bleeding, no color shift, no ghost. the PERFECT panel can used for laptop display indeed. It is shame that LG display is making blurry, eye-blowing craps instead this nowadays. also PWM pulsation is not seen in my 8760w.
I'm a bit surprised not to see the Surface Pro 3 listed here (hell yes, it's a laptop). I'm no fanboy, but I was blown away by the job Microsoft did on this thing - it's truly one of the best displays I've ever seen anywhere - and it's considerably cheaper than most of the competitors you list here, too. It also gets bonus points in my book for its modern and useful 3:2 aspect ratio that doesn't force you to work through the 16:9 HD "mailslot". (Only two of the laptops here are even 16:10, which is still pretty lame.)
As for PWM, I agree stats would be good. PWM is a deal-killer for me - like LED taillights (yuck!), PWM for backlights is horrid and incredibly visually stressing. I'm really not sure it's possible to crank the frequency up enough to keep it from sucking, since the blinking is the fundamental problem, and a great many people are obviously sensitive to it at frequencies that are "supposed to be" way beyond perceptible.