The XONE-exclusive Rise of the Tomb Raider has now been confirmed to be a timed exclusive. Let’s face it, that was always suspected to be the case, but there were rumors that Microsoft Games Studios had direct involvement, thus precluding it from a release on other platforms. After all, Microsoft is publishing RotTR themselves on XONE.
The PC release is just said to be “early 2016”, but given that the game is set for a holiday 2015 release on XONE, it won’t be too far behind. I would guess they want those hot January dollars. PS4, meanwhile, will lag behind by a pretty large margin — Square Enix stated the game will be a console exclusive for XONE/360 for a year, and the PS4 version would come out by holiday 2016.