It seems that GoPro is not quite done with camera updates this year. They just released a very small variant of the Hero 4 hardware called the GoPro Hero 4 Session. Some jokes have already come out about the name like the next Re-Session Camera to own. However this is more of an evolutionary and reductionist product than any release GoPro has ever made before.
The Hero 4 Black is a powerhouse little camera with great frame rates for slow motion and 4k video at 30p. Some have criticized the codec in 4k mode as being too lossy and we agree to a point. What interest us however is not the 4k mode for now which is absent from the GoPro Hero 4 Session altogether but the lower res Full HD and HD slow motion high frame rate modes.