> There's a huge difference anyway between iPhones and books/newspapers. It's not a good comparison. The only similarity is the posture one holds when consuming them, which is why your photos sort of work for your argument. Reading a book or newspaper takes effort and concentration, whereas flicking through whatever stream on your iPhone takes little to no thought at all. It's active consumption vs. passive consumption.
You assume way too much about what people do on their phones. I used to commute to work via bus. I was one of the many people with his face stuck in his phone. You assume I was "flicking through whatever stream", not thinking at all. You'd be wrong -- I was almost always either reading books for leisure through the Kindle App, or reading some research paper PDF I had stored on my phone.
Many other people would be having SMS conversations, I'm sure. I don't know by what logic you can insist that this is less productive or worthwhile than having an idle chat with the person next to you, or just sitting there staring blankly (which is what most people not using a phone do).
> I believe that to live a healthy life you do need a good balance of production and consumption.
While this is true, it's irrelevant. You haven't shown or given any evidence to support that people who engage in social networking or who use smartphones for leisure have a worse production/consumption balance than those who read books, newspapers, or magazines.
> I'm simply worried about how ubiquitous and in-front-of-our-faces these devices are becoming, and how addictive they are.
You've yet to give a reason this should be something to worry about.
> I enjoy reading and going to the cinema
and you've offered nothing but your opinion to support that your choices of leisure are better than any other choices. You're not saying anything worthwhile, man. Give me a reason to think you're anything other than a kid who's emotionally immature enough to think that he's better than everyone else around him because he's not on Facebook.