Obviously things will get expensive quick, but the main thing for me would be not dealing with the context switch every time I leave the agent to do stuff on it's own.

Feedback loops for prototyping could become even quicker.

Branching strategies, do 10 things in parallel and evaluate for the best at the end or something along the lines of an evolutionary algorithms. Turn up the temperature on an LLM and have a survival mechanism, and generate solutions to the same problem over and over.