This sort of thing worries me for a bunch of reasons, but the biggest one is that it seems like most kinds of successful endeavors require three things:
1. Persistence
2. The means to set aside time for that persistence.
3. Luck
Number 2 is what most people tend to lack. Especially in our current climate, most people are mentally, physically, and financially exhausted by the ostensibly simple act of getting through a day and making sure that their existence is stable for the next month or so.
But let's say that we get to a point where your average person can have 1-3 hours every day to comfortably spend on their dreams. How much of that time would be spent right now on social media or idly flipping through some other form of cheap but nicely-diced and easy-to-digest content?
Probably most of it. But isn't that exactly what people already said about television and video games and stuff? Isn't it possible that that 'wasted' downtime is actually important to peoples' mental health? Maybe, but personally I think that social media has the comparative drawback that instead of relaxing you like other forms of entertainment, it probably makes you more stressed out. The article sure thinks that 'it's different this time.' And that makes for a vicious cycle of uselessness.
But at the same time, I also think that smart devices can be extremely useful - speaking of attention, how great is it to not have to remember things like 'what is the density of steel' or 'what sort of communication protocol does this chip use' while still being able to access that information in under a few seconds? That should be something that anyone can access cheaply and without artificial barriers.
So I guess attention is probably just going to be another commodity with staggering inequality of access. When you think about it, that's really fucked up; a person's mind and body should be the alpha and omega of their unalienable possessions, don't we hold anything sacred? How long until we're paying to turn off Harrison-Bergeron-style rigs?