I don't know WIX except from Googling it just now, but these things have existed for quite a while. So far they have, at best, automated some of the boilerplate tasks.
Creating specialized software to make common patterns easier is one thing. Making software to solve programming problems in general needs huge advancements in artificial intelligence.
I would personally predict that there's a lot of years to go before programmers become obsolete.
It will eventually happen. But the same is true for every other job.
Which language you should learn depends mostly on what kind of things you want to build or what problems you want to solve.