I'm not a 13-17y/o, but I am a teenager with a smartphone, so I feel like I have a different perspective on this than some of the other people in this thread.
Personally, I think that not being absolutely glued to one's smartphone is definitely a good thing. I recently installed an app that tells me both how many minutes/day I use my phone and how many times I turn the screen on. It's been pretty eye-opening, and I'm now actively working on using my phone less. I also love to read, so I spend a fair amount of time doing that that I might otherwise spend on my phone.
I think one major difference between smartphones and some earlier life-changing innovations is that it's pretty easy to use your smartphone damn near constantly. I feel like with some of the other things that were on Chris's graph, such as radios, refrigerators, color TV, and even computers, you had to be in a specific place in order for the technology to be useful/usable. It's easy (and very common) to bring a smartphone with you wherever you go, and whenever you don't explicitly have something to do, you can just whip it out and get instant entertainment. I think that resisting the urge to use it anytime you're uncomfortable/bored/etc is a good thing to do -- otherwise, it seems likely that you'll end up completely dependent on it.
Honestly, I think that for kids, things may have been better before computers and smartphones. I find that so many people around my age just spend a ton of time not really doing anything, because they can be entertained by their phones/laptops all the time, and it kind of bums me out. I'm not saying I'm not guilty of doing that myself, but I put conscious effort into making sure I'm mostly doing things that are valuable to me for reasons other than being entertained right now.