The push jerk requires more energy and more precision than the split jerk. Now the squat jerk might require not as much power as the power jerk, but the position is still unstable and difficult to recover from. Not to mention that you cannot correct for errors once you are in the squat.
Hence, I don't see why the squat jerk should be "the future". It would be good, if lifters were more consistent in their jerk attempts. All too often you see an easy clean followed by a poor attempt in the jerk.
http://www.sportivnypress.com/2014/p...with-the-jerk/Biomechanical experiments show that the “push jerk” requires 13% more force for a successful lift than the split style. The “corridor” of a successful jerk with the “push jerk” style is about 10 – 15 cm from the center of the ankle joints to the center of metatarsal phalangeal joints. The same “corridor” can be significantly greater (up to 30 – 40 cm) with the split style of lifting, which allows some imprecision in the half squat and thrust of the barbell and still permits a successful lift in the split position.