I've just come across an article from Hi-Fi News, October 1967, which is making predictions as to what hi-fi will be like in the year 2000. It's interesting to see how the author thought things would develop.
http://www.saturn-sound.com/images%2...67%20-%201.jpg

http://www.saturn-sound.com/images%2...67%20-%202.jpg

The author predicted that cartridges that would weigh only 1 gram and the tracking force would be only 0.1g !! He didn't predict that vinyl would become obsolete, then come back from the dead because "it sounds warmer"