From the GSMArena review of the LG G3:
http://www.gsmarena.com/lg_g3-review-1086p3.php
ok, this is where I'm jumping the bandwagon about QHD being a bad choice at this point. A 763:1 contrast ratio, down from the LG G2's 1300+ (gsm arena's number for the G2 is higher than what I more commonly see), is too much of a sacrifice for something with so few concrete benefits. And look at that browser endurance score; 6:40 down from the LG G2's 11:22 hours..!!
If making LCD QHD screens requires such a sacrifice in contrast ratio, QHD Amoled might be the thing to look out for. Those, by definition, won't have contrast problems.
Notice also that they're doing something really weird with the brightness slider calibration: 50% outputs only 1/6 of the brightness of 100% on the slider and about half as much as the average other phone does on 50%. This is probably a trick to hide QHD's impact on battery life. They're hoping that uncritical reviewers will put the slider at 50% or below in their battery life tests and then compare it to phones on the same slider percentage setting and call the test "fair".
http://www.gsmarena.com/lg_g3-review-1086p8.php
"We didn't notice any significant focus speed improvement brought about by the laser autofocus compared to other flagships" - disappointing, although if it matches the S5 it's still pretty damned good.
Looks like I'll be holding on to this G2 for a while longer.