The DJI Phantom 4 quad copter drone has started shipping in some parts of the world and we now have a few samples of what the slow motion 1080p 120fps mode looks like. At first glance it looks to be ok with few artifacts controlled aliasing and moire and while compression seems severe, it is above 720p pixel quality which is encouraging.
There is an inherent softness as with many other 120fps modes used in similar action cameras like the GoPro Hero 4 or Sony Action Cam which spread the bit-rate of their maximum throughput and dice it to 120fps in the case of full HD.