In 1969, jamming with buddies in my basement with my SG Deluxe and Silvertone amp, I had no idea what cool musical stuff waited for me in the future.
I could not have conceived of playing a Les Paul style guitar that did a great job of modeling about 25 guitars (Line 6 Variax).
And the thought of having access to every cool amp / cab in one computer based amp (Kemper) would have completely blown my mind back then.
I am living in times where musical science fiction has become a reality.