You sure about that?
Before a smartphone I used to lug around with me a dumb phone, a camera, AND my mp3 player. Now those are one device. And I take more photos because my camera is with me all the time whereas before that would have been hit or miss.
Additionally, once I take those photos, I can upload and share them right that minute. Liveblogging things and keeping me in contact with people more. I know when friends are at the same venue I am at, like a concert or amusement park, that I might not know about any other way. I can find things easier with navigation. I can talk into it and ask what's around me and find out. I share a grocery list app and a to-do list app with my partner so that we do not duplicate buy at the grocery store and are always in sync with one another. So yeah, it's changed the way we live. It's improved things for me immensely.