Well, different strokes for different folks. However, modern smartphones are essentially portable computers, cameras, camcorders, radios and ipods!!!
They are amazingly versatile. My phone has a 8 MPx back camera with dual LED flash and a 2 MPx front camera, allowing full videoconferences (if I want). It records video at 1080p (the length of recording depends on available memory). It does make calls alright, checks the weather, my calendar, my email etc, etc. It is an indispensable little beast!!