I can honestly say that the standard for smartphone displays is decent enough that I definitly have a couple of priorities above the display that I wouldn't care how good the display is, if doesn't meet those priorities first, I don't want it. Key being carrier, cpu, ram, battery life, size/weight, brand/UI, then the display itself. Like I said, the standard for smartphones is good enough that it's not as important for me as long as a matte screen protector exists for the device (which is pretty much every smartphone). I have yet to meet a modern device display that I cannot tolerate under all conditions. And maybe its just me but I rarely find myself walking under direct sunlight. And even when I do, I try to avoid it (not because of my phone, just I have no joy in it XD).
Just my 2¢