Exclusive first look at Nokia
the whole article is about the feature coming to a Lumia 920...which has an LCD...
Nokia Lumia 920 - Full phone specifications
So, I really didn't get your statements as to how it would affect everything. You are saying it WILL kill the Lumia 920 battery...?
I kind of have a feeling it will require the screen to always be on/black...like when you let your phone go to 0% and plug it in, you get the Red Battery screen but your phone is still ALWAYS on, the Red Battery just hides a bit. It is easy to tell if you are charging your phone is a completely dark room.