This is just some wild speculation on my behalf after recent news but I think CDProjeckt Red will target next generation platforms for CyberPunk 2077's release. They're a proud team with huge ambitions and clearly PS4 and X1 halted their graphical ambitions somewhat with Witcher 3.
No Cyberpunk news til 2017: http://uk.ign.com/articles/2015/05/27/cd-projekt-red-wont-talk-about-cyberpunk-2077-until-2017
No one expected this game to be released soon and the sight of it in 2015 wasn't even a given but them knowing full well that they won't "talk" about it til 2017, makes me think 2018 is the likeliest release. I don't think they want to be short changed again and this coincides with my believe that this generation will be shorter then last with new consoles out in the next 4 years with full backwards compatibility and almost identical architecture.