SpookDroid
Ambassador
Let's just see what happens in the next few months/years on these forums. If many people are reporting screen burn in from their real world usage (whether with AOD enabled or disabled), then we will have something more to talk about. I'll be sure to report any screen burn in.
I've had AMOLED phones since the S2 and not once have I had image retention issues on any (at least 1 year of use each). And on the S2 I had NoLED, which had all notification icons floating around the screen when on standby, not unlike AOD.