Fresh off recent releases of the GTX 1080, 1070, and 1060 Pascal GPUs. Nvidia has announced the GTX Titan X. This will be the top of the line card in their Pascal lineup.
The GTX Titan X features 12GB of DDR5X RAM, running at 10Gbps with a 480GB/sec bus speed. It will have 3584 CUDA cores with a base clock of 1417MHz (1531MHz boost). Power consumption for all this performance comes in at a relatively low 250W. The card runs off of an 8-pin and 6-pin connector. You should be able to pick one of these up on August 2nd for $1200.
You can expect around a 40% increase in performance over the GTX 1080. Hopefully we will finally have a card that can run high end games maxed out at 4k 60fps.