The greatest thing the 70's had going for it was that there was no Walkman.
The Walkman and the advent of personal audio completely changed the landscape of how audio was delivered. It used to be that you had bulky headphones connected or some tiny little earbud in place, but no real quality portability. It meant that audio that was portable, was large, and loud. It meant that in a home setting, the standard way to get audio was by blasting it if you wanted it loud. You got speakers and cranked them up.
Then, suddenly, things got quiet.
The Walkman ushered in a new age where you could get decent audio anywhere, at any time, and a set of earphones and shortly thereafter halfway decent earbuds were easily available. It didn't cost you hundreds of dollars in speakers, amplifiers, receivers, and equipment for access. For under $100 you could blast your music and you weren't even bothering others in your home. You could travel on planes while listening to a custom mix tape of your own. What could be better?
Now, forty years later, and we recognize what could be better. Or at least the progression of what the Walkman introduced. Wireless headphones that last all day. High resolution audio that sounds better than what the best sound systems could deliver in the 70s, and all of our music stored on a device we carry with us everywhere all the time. Computers that allow a shared experience if we want, or complete solitude when we want it. The ability to go with components that have better designs than any other time in history, and a far better inventory of not only raw materials, but the knowledge of how to utilize them like never before. Built upon that knowledge gained throughout the 70s, before and since.
The push will be forward, as it always is. Directional headphones with surround sound are amazing for many gamers. In ear headphones that sound better and better and better and do more and more and more. It will continue to progress. Hitting a point where we don't carry any of our music with us, but always stream from a cloud, and music we want, on demand. Longer lasting batteries that last for days, or weeks, or longer. The past isn't a bad time, and for those who were teens in the 70s, they easily recognize is as most teens do... it was one of the best times in history. As a child of the 80s, I have my own feelings of those years. But, when it comes to technology, it is hard to best where we are at today, until you ask me again tomorrow.
We aren't in the same public space for music that the 70s enjoyed. That certainly has taken away the required social aspect which music of the 70s and early 80s enjoyed like no time before it. It also holds some melancholy and we are unlikely to ever return to such a time of public audio being the norm. On the plus side, I can watch a new release movie, with high quality audio, at 30,000 feet while flying from NYC to LAX and nobody around me complains.