As with last year, Xiaomi is projected to update its gaming phone with a mid-year upgraded variant. It is likely to be called the Black Shark 2 Pro in 2019. It already has a reservations page on the retailer JD.com, which has let a heretofore-unknown detail slip: the phone's display will come with "DC dimming 2.0".
https://www.notebookcheck.net/Xiaomi-Black-Shark-2-Pro-now-slated-to-come-with-DC-dimming.428188.0.html