It's hard to say what this means. They didn't give a single example of the kinds of situations the remote workers help in. I can think of an array of different kinds of situations ranging from "should I continue with this route or turn back" which would be a yes/no dialog box with the car prompting monitoring to real time pedal inputs or emergency stops by people watching the displays constantly.

~~Generally when a company is vague about these things, you should assume there is some very intensive aspect to it undercutting their claims of autonomy or some aspect where people think its dangerous.~~

EDIT: See link below.