I've only been following the comments about the 2017 iMacs for a couple of weeks. But I don't recall anyone complaining about screen defects (except one comment about unfortunately receiving an iMac with a cracked screen). Practically every new computer product launch, regardless of manufacturer, comes with some complaints like uneven backlight, color gradients, backlight bleed, dead or stuck pixels, etc. I know the screen on the iMac is beautiful, but I'm surprised there are no complaints from anyone. Does that mean very good quality control on the panels? I'm looking forward to mine being delivered.