A couple of weeks ago two Samsung tablets were imported into India for testing - the SM-T718 and the SM-T813. Those have now passed through GFX Bench and confirmed suspicions that they are the successors to the AMOLED-packing Tab S2.
The SM-T819, the 9.7" Samsung Galaxy Tab S3, will have a Super AMOLED screen with 2,048 x 1,536px resolution (same as the iPad and the Tab S2).