Do you imagine C++ becoming a highly valuable and sought after skill for systems that were written in C++ (ie, something like COBOL today)?
Most of things that are poised to take off in a dramatic way - like cloud and browser in 2005 - are heavy in local/edge computation with a fat pipe to the internet. Examples - Games, AI, ML, Robotics, IoT, sensors, drones, Industrial equipment etc.. All of these actually favor a language like C++.
Not everything in the world is a SaaS business connected to the cloud via a browser.
This is not a very clear corollary. C++ was never browser-native, but even still you can use it to write WASM webapps. Cloud software has been written in C++ since forever ago and there's little reason to expect it will stop.