MM360 of CDPR was kind to respond to that:
Since CDPR are interested in feedback and opinions and claim they don't treat platforms with favoritism, what about other major PC systems besides Windows - Linux and Mac OSX? In the past, CDPR released Witcher 1 and Witcher 2 for Mac OSX at least (the first using Wine wrapper, and the second as native OpenGL 3 based build).
Just for the reference - Playstation 4 is claimed to have OpenGL 4 support. Mac OSX is getting OpenGL 4 in the upcoming 10.9 "Mavericks" (scheduled for Q3 - Q4 of 2013). Linux has OpenGL 4 support already.
The situation is also different in comparison with TW1 and TW2. Since Windows version of TW3 is using DirectX 11 (as CDPR confirmed multiple times already), users of Linux and Mac OSX won't be able to use the Windows version with Wine, since DX11 support there is not likely to arrive any time soon. So Linux and Mac OSX users will be simply locked out from playing TW3. This hardly can be seen as a lack of favoritism. So would CDPR be interested in working on OpenGL 4 based Witcher 3 for these platforms, may be as a second step after the main release? Did CDPR consider this issue at all or didn't even decide about such plans yet? This is a concern from the users who would like to play TW3 but won't be able to if it won't come out with native ports to those platforms. If you are really listening to feedback, please comment on this issue.