Chances are that Alzheimer's will not be seen as caused by amyloid plaques. And the notion of electric power from magnetic-confinement fusion will be a grand joke.

In almost any field, you can find old mandarins struggling manfully to suppress the work of youngsters who will overturn their fond delusions as soon as they have retired or died. The former group, emeritus with plenty of free time, are all over Wikipedia defending their legacy against appalling new evidence.

There is even a law, attributed to Max Planck: "Science advances one funeral at a time."