The 17.3-inch P57 now features GeForce GTX 1070 graphics, while the smaller P55 has a GeForce GTX 1060 graphics adapter under the hood.
http://www.notebookcheck.net/Gigabyte-updates-the-P55-P57-series-with-NVIDIA-Pascal.171635.0.html
No 4k? huh
No Thunderbolt 3 support! :-(
No one of the new Gigabyte Skylake Notebooks with nVidia Pascal Geforce 1060/1070/1080 does supports Thunderbolt 3!
All new Gigabyte Notebooks P35x v6, P37x v6, P55x/w v6, P57x v6 and also the AORUS Series X5 and X7 v6 coming without Thunderbolt 3 support!