A before and after in the history of mankind. A milestone carved in the memory of all mankind through time and space.
Look upon my works, ye mighty, and despair.
The sentence certainly sounds arrogant, but I have seen such phrasing used also by novice authors who were simply trying to sell a result that they were enthusiastic about. Like the present article's author, these were always non-native speakers.
Perhaps its humor?
Maybe Schrödinger's satire. Either it's satire or not based on the reaction of the reader