Is this possible under any configuration to use as an external display with high enough framerate for video?

Audio can be dealt with via a BT headset, along with media controls.

The idea is using it as a decently nice display (touchscreen bit the dust a while back on my n810) to watch videos in bed, with all the encoding and cpu/gpu intensive stuff ran on a pc, to get full resolution and good framerates.

Just a thought.