http://gematsu.com/2015/07/rise-tomb-raider-coming-pc-early-2016-ps4-holiday-2016
Edit: From Tomb Raider Twitter
Rise of the Tomb Raider will launch for PC (Windows 10) via Steam in early 2016 and for PlayStation 4 in holiday 2016, Square Enix announced.
The game will premiere first for Xbox One and Xbox 360 on November 10, this year. The PlayStation 4 version will arrive one year after its initial launch.
Edit: From Tomb Raider Twitter
@tombraider: Rise of the #TombRaider coming to Steam/Windows 10 early 2016, PlayStation 4 Holiday 2016: http://t.co/bLfCIzKdHO