Just as WWII delayed the development of television, so it also delayed certain audio advances. I can't locate it right now, but, a few years ago, I came across an interesting article in a 1940s issue of down beat. It was about a new way to play records, and I think Motorola was the company that was working on it. This development did not change the discs but rather the playback equipment, eliminating the needle (or stylus) and replacing it with a photo-electric "eye" that read the variations in the record's groove.
When it comes to thinking ahead, this item from the January 5, 1901 issue of the NY Times is even more remarkable: