I find the glance screen quite difficult to see at night. My phone is laying flat on my bedside table and from the angle I view it the text is very difficult to distinguish from the backlight glow/bleed. Can the brightness of the text on the glance screen be increased? Or make it larger?
Even better, make it red! Like the Lumia nighttime setting for glance screen.
I feel a product feature idea coming on...
Screen burn and image retention has been mentioned before for AMOLED screens, but they've been used successfully for years. It's all about construction - get it right, and there's no problem. Anyway, this is off-topic really.