I expect TypeScript to get even bigger in 2018. Its more than just static types for the purpose of helping find bugs; its also a means of documentation and really powerful intellisense. As developers build larger and larger applications in JS, I think the power of TS will start to hit a wider audience. Not to mention the complete fragmentation of the JavaScript versions available on browsers vs NodeJS. Any package/framework that wants to be popular is going to need TypeScript bindings.