No. It remains to be seen and priced.
I highly doubt it will max out a game in 4k. Maybe medium graphics in 4k. Build a pc, but you'll need to spend around 2 grand to get 4k ultra settings. If you don't mind sli, getting two 1070 is a great option. A single 1080 struggles to max games out in 4k. The sli 1070 beats a titan x in some cases.