It's all in the delivery.
And if you think there's no personal significance to the choice of the word "Eclipse" in the piece's title, I'm gonna have to disagree upfront. To a man whose time never really came in his lifetime as far as being fully accepted for the genius that he was, it's a look to the not-too-distant future where the cultural mindset that invariably condescended to him would be in decline, with nothing to stop it.
What you here in that speech is a man sitting back and waiting for a future that, whether he lived to see it or not, was inevitable. Duke's delivery virtually drips with sarcasm and delight as he, as always, plays the role of "sparklingly gracious" while also, as always, saying more than he lets on. The way he delivered it played perfectly to how he knew that a lot of people wouldn't get it. Yet.
And whoever designed that cover was a genius. A lot of phone books of the time had a very similar look, kind of a "these are the faces of your neighbors" trip. Well, in the future, THESE are going to be the faces of your neighbors:
Ready or not, here we come!
Duke was saying a helluva lot in that speech.