The Mac / Apple ecosystem has many people hooked. After folks get their first device, many go on to get several more. Apple computers, tablets, phones, and mp3 players can all be easily linked, bringing convenience to the complex lives of many today. Just one Mac Mini is fine for my own simple life. It mostly stays at home, where I do a lot of my work, but is easily transported and hooked up to a projector or monitor on campus on the odd occasion. Away from my work, I prefer stay in touch with the real world around me. On the rare occasion I carry a mobile phone it is a $20 cheapie ($40 prepay does me a year or more), and I have no need for other mobile devices.