"Air Wake Up" (or "Gesture Wake Up" in Galaxy S6) is NOT the same as Quick Glance. AWU/GWU just do exactly the same as pressing the power button. Glance takes you to a different screen - completely black with clock, date, notifications, etc. Great for quick checks, during night etc. On AMOLED screens it only activates the pixels used to display the text & symbols, not the entire screen.
Does anyone know if this can be enabled on a Galaxy S6? I tried an app from the store called Glance but it didn't work very well.
Google "galaxy quick glance" or "lumia glance screen" to see how it should work.