Hello Andrej,
It might be becoming a niche language for smaller to medium-sized projects. But it's being used in a host of big applications, from games to game tools, 3D tools, audio tools, compilers, front ends and back ends to just about everything. I don't think many of these will be ported to a different language (such as D) unless absolutely necessary. For those big projects C++ isn't going anywhere any time soon.
Even if that's true, eventually those programs will be replace with clean-slate replacements.
-- ... <IXOYE><
