Futurology is interesting, but it is very chancy and it has proved difficult to predict in much detail what the distant future will bring. Still, they did fairly well.
They were already working on the video camera and VCR, so that wasn't a difficult prediction, and the article seems to conceive the sound as stereo rather than multi-channel.
Transistors were also being worked with, so that wasn't terribly prescient, either.
Electronic music was already a reality back then (think Edgar Varese and Hammond organs), so this was just another extrapolation based on things already in process. There is a fair amount of it but it certainly hasn't replaced acoustic instruments, though many recordings are so manipulated nowadays they could be classed as mixed electronic and acoustic.
The article envisaged a compact music playback format, but apparently did not conceive it as digital since it mentions "probably tape wafers."
Light rays to read phonograph records is a reality today, but there are only a few players, and the last I checked, they were expensive.
