We have a lot of stages to go through before we achieve the level of development you're describing, and I don't think you can confidently argue 10-15 years vs 5-10 years vs 20-30 years.

As with most technology job predictions, it won't happen the way most predict. Yes what defines a developer/swe will change, but our history has shown us that we are likely to see an increase of jobs in technology for the long term. I remain optimistic that most people will find new roles as they emerge.