LG G3 Cat.6 — Just how much battery does a QHD display use?

We don't have the LG G3 yet, but we do know that it will have a 2K display resolution (2,560x1,440 pixels) on a 5.5 inch screen.

The battery we're expecting to be somewhere between 3,000 mAh and 3,300 mAh, but is that enough to make up for the additional demands that kind of screen will place on it?

How does the balance between power-optimized processor and larger battery correspond to larger display size and increased resolution? Share your thoughts!