It will (it already is), but this commoditization is common. The bleeding edge development is still happening, like people developing squarespace, wordpress, web development tools and frameworks. Look at github. Today more then ever we have a lot of software developers living from their code and giving it back for free. And we still have a lot of work to do, so actually more web development jobs will be created before it start to decrease.
We are on the same page in terms of when this shift is going to happen, and I 100% agree with you in your description of the current software ecosystem. Although, the point of my question was to explore other paths that people in web dev could consider for when that time comes.
