Probably not, at least on the desktop, good luck getting drivers working when you see the state of Linux / BSD after 20 years and thousands of engineers that worked on them. It's 2019 and we still have issues on Linux that were fixed in Windows XP era.
Also I think people are blinded by that "rust safety" thing for an OS, it doesn't really matter, Redox that is written in Rust had a challenge a year ago about breaking it, it took a few minutes for someone to kernel panic with bad arguments in a user space CLI, so how long do you think it's going to take to have something as secure / stable as Linux for Redox, 10 / 15 years and at the same time you need all the features / drivers to have a usable OS, just forget about it. The only way you can have a "successful" OS nowdays is to target a very specific niche / usecase.
Given the amount of software that runs on servers with a limited footprint need, or orchestrating virtual machines or containers running similar/other software I wouldn't count out the potential. It won't be a desktop application anytime soon, but there is room for the OS is the Service type of OS.
Also I think people are blinded by that "rust safety" thing for an OS, it doesn't really matter, Redox that is written in Rust had a challenge a year ago about breaking it, it took a few minutes for someone to kernel panic with bad arguments in a user space CLI, so how long do you think it's going to take to have something as secure / stable as Linux for Redox, 10 / 15 years and at the same time you need all the features / drivers to have a usable OS, just forget about it. The only way you can have a "successful" OS nowdays is to target a very specific niche / usecase.