There will always be people working. Labor is cheap. It will always be front running capital intensive automation that needs to generate a margin to be successful, a margin based on data from people doing that job.
Labor is cheaper than machinery until it isn't. I think we have some historical examples back in the period known as the industrial revolution that might speak to this.
The point is, machines need to be built and optimized. That has a cost that even today is high enough where its still better to have a worker flipping burgers, even if we have the technology to automate this already. The cost of labor is just that low, and the cost of automation is just that high, and the amount of profit you get from burger flipping is only covering so much overhead.