As a cabinet maker I have to carry tools with me very frequently. The most useful and favorite carrying accessory for that is a belt. There are pouches, bags and cases made for any type of devices or tools that will slide on a belt. But nothing with style I'm afraid. Worse I've purchased bib and brace pants because the weight of toolbelts is starting to strain my back.
Another way to go is that there is more and more clothing made for working with small tools about you. Mostly in Europe there are many companies that tailor to that market. Namely Mascot in Britain, Eberhard Strauss in Germany and so many more that sprout around the world that it's difficult to keep track of. Some of the clothing takes root in military styles but evolved to something different that can be appealing to some.
Photography is another domain to inspire from as the equipment required to perform at the ready has to be near the body at all times. Then again styling needs are difficult to sustain there.
What I wear the most away from work since I am a tent camper is rock climbing pants from
Outdoor Research. They feature just enough pockets at the right places not to hinder movement for carrying some eQuipment along. And they are kind of attractive to boot.
I read with a Kobo Mini. It's easy to tuck in a polo shirt pocket. Sometimes I use an iPod Touch that I carry the same way. But I'm still waiting for a device that would be in a size between the two and thought that the iPhone 6+ would do it but it's too long and not wide enough.
How about a Google Glass type reader/phone/computer type of device?