C is limited in its support for complexity management in my opinion. For a very large project, C++ provides the kind of OO facilities necessary to make the project understandable at any level of abstraction.

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Low-level drivers seem to still be done mostly in C in my experience, although I imagine this is changing. Games (and really any system that approximates or is real-time) probably still heavily use C++. Really, any large system requiring efficient processing can benefit from C++. I agree with you - C# is my language of choice for writing a typical Windows app. The .NET libraries save me hours of time and the language is a pleasure to code in. But it is not always possible to achieve the necessary level of performance.

I'm not sure it's accurate to say it is being "killed". Developers are being required to know many different technologies. IMO, C++ will be around for a very long time because it provides an excellent balance between high and low-level programming and because some of the most talented and experienced software engineers have a lot of C++ experience. It will probably continue being used whenever efficiency is important in a relatively large, complex system. (C is sufficient for smaller projects and probably will continue being used for low-level drivers, etc, but there aren't as many tools to limit complexity in C as in C++.) Despite what appears to be a common belief, C++ provides excellent facilities to limit complexity. In general, .NET-based/Java and all these other newer languages are probably more useful for typical GUI and web-based application development. But for more advanced development involving real-time systems, video processing, machine learning, etc. - research development kind of stuff, I suspect C++ is the language of choice for many.