Keep in mind that the book is very old, published in 1931. DNA hadn't been mapped, information technology was limited, and so on.
In the book, people are born in factories. Working class people are born in from split cells, as quintuples if I remember correctly. Your role in life is largely determined by your genes - workers don't have the psychology for anything but labor.
In spite of that, it's not an especially oppressive society. There is a "perfect" drug, soma, which is sort of like a non-addictive, non-physically harmful heroin that can be delivered by gas. When there is unrest, security forces come in and get everyone high until they chill the fuck out.
Sex is open and easy, but always completely voluntary by everyone involved. When people are turned down they are sometimes surprised but never upset or aggressive.
Entertainment is presented as vacuous, but the people seem to enjoy it. There are movies, TV, and so on. Sports are engineered to require people take trains out of town to stadiums, and require deliberately-complicated equipment to play, in order to create demand for production.
So... is that a dystopia? There is no discussion of environmental damage, but overall it seems sustainable, not predicated on infinite growth. People are stuck in the role they were born to, but it seems like there are no artificial barriers to advancement... just that not everyone can be good at everything.
Definitely. A world where people are happy and healthy and live basically fulfilling lives. There are a few fanatics who opt out, and they're unhappy. Go figure.
Again, our proposal isn’t that we should cover all of this land in solar panels, or that it could easily power the world on its own. We don’t account for the fact that we’d need energy storage and other options to make sure that power is available where and when it’s needed (not just when the sun is shining). We’re just trying to get a sense of perspective for how much electricity could be produced by using that land in more efficient ways.
I mean, there are Purism phones. Super expensive, but they keep selling out so I guess they are reasonable.