After working with LLMs for a while, I'm pretty sure we're close to a prompt like this, "In style of Kurt Vonnegut, write an essay about the career of US Grant, include his military accomplishments and his burial." The output would likely be an essay that would pass the test and be impossible for a professor to detect.

Perhaps education will have to value cognition and ability to apply knowledge over being able to organize and communicate facts and accepted opinions. One thing is sure, a lot is going to change over the next two decades.