I would much rather they don't do that and instead offer tools that can answer IDE-like queries (e.g. "Who calls this function?", "Where is this identifier defined?", etc.) and let people integrate that into Emacs, Vim, Atom, and other editors and IDEs. This brings all the communities together and doesn't dictate one particular tool over all others.
https://www.rust-lang.org/ides.html
>We propose a new tool, an 'oracle' which takes input from the compiler, maintains a project-wide view of the code and it's type information, and provides data about the project to IDEs and other tools. The oracle is a long-running daemon and presents an API via IPC.
Which is great idea. But it is not implemented yet (AFAIK).
personal opinion : Rust with this pace, will be absolutely one of the best language in term of usage/tools in next 5 year.