Cross platform IDEs for C++ like Qt Creator and JetBrains Clion already made huge progress over the past years.
There's a good chance that we'll see the emergence of a high quality reusable open source C++ language service component for editors over the next three years or so. Google in particular seems to be putting a lot effort into Clang, LLDB, Kythe and other developer tools. Facebook is also working on a web-based IDE and presumably has interest in good C++ support. Modules in C++17 (which Microsoft intends to adopt quickly) will probably make things easier.
If you haven't already, check out srclib, an open-source cross-language cross-editor code analysis library designed to support things like editor plugins: https://srclib.org/. I'm one of the creators and would love to hear your thoughts.
There's a good chance that we'll see the emergence of a high quality reusable open source C++ language service component for editors over the next three years or so. Google in particular seems to be putting a lot effort into Clang, LLDB, Kythe and other developer tools. Facebook is also working on a web-based IDE and presumably has interest in good C++ support. Modules in C++17 (which Microsoft intends to adopt quickly) will probably make things easier.