I feel really freaking old for a 21 year old. I got an Iphone 3gs back in 2009 before going into college. I should have been the target market for most of the tech revolution, right? I only used the thing to watch youtube, read pdfs, browse websites (never write anything), and take really ugly photos and video. I rarely made calls with it and canceled text messages entirely in 3 months. The battery died this summer, and I just got a tracfone just so I can call my grandparents because almost all my vocal communication is done via skype, jabber, or mumble. Maybe most importantly? I not only never paid for an app, I downloaded a total of like 5 in 3 years.
I have a Transformer tablet though, which I still wouldn't call the center of my tech environment, I just use it to read articles, books, and watch video. I don't even do the picture taking with it because its a giant book and it is so obtuse to photograph with it. The high DPI screen makes reading wonderful on it though, which is the main reason I have it. I did get the Transformer + keyboard dock so I had the ability to write when needed.
I don't think I'll ever get a 4 - 6" smartphone again. Anywhere I go I'll just throw my tablet in a backpack and bring it with me if need be, or just carry it. You won't shrink the screen any more and I just prefer the 10" form factor.
I still carry about my dumb phone just because we still live in the stone ages of ubiqutious internet. I don't want to pay $50+ a month for data just to have internet on the go. I already pay way too much to run a DSL signal to my home router.
I dunno, I just feel like the smartphone market is saturated. Modern computers have a very finite limit of influence over the world since they can only impact it through vibrating air, itself, or through emitting electromagnetic radiation in various forms. And I already have all the audiovisual stimulation that I want already, so I won't be adding any more. An RSS feed of all my choice webnews and the front page of reddit and HN for laughs is all the digital media consumption I really need anymore.