I would like for this to be the case, but I'm not so confident. Even a few years ago, you had corporate investment in the form of Kitura and S4TF. Now you have a few small open source projects.
The language itself is ready, but the tooling is just not there. I think the main obstacle is the lack of investment in cross-platform support by the core team. Until I can `apt-get install swift` I don't have much confidence it can gain adoption outside of the Apple ecosystem.