Note the line, “More details to come within the upcoming months.” This could hint at the studio’s involvement its long-rumoured Thief 4 project. Word on the street is the game is in development for PS4 and Xbox 720.
Maybe I missed it but I don't see anything in those links that hints it might not be on the PC. I think the emphasis is that it'll be on the next-gen consoles (as opposed to the current gen) not that it won't be on the PC. It's almost unimaginable that they wouldn't release it for the PC given that it's been a mostly PC series and that Edios released DX:HR for the PC (demonstrating they have respect for it as a platform).
"The sophisticated technology in the new consoles should be enough to make a new Thief game look amazing with its Medieval/Steam-punk setting. Whether this will be an exclusive or multi-platform is also up in the air as of right now, but if Deus Ex is of any indication, we expect Thief 4 to hit PC and all of the Sony/Microsoft home consoles."
More at the link