A study suggested that about one-third of each household has three of more smartphones. Then you have tablets, laptops, and desktop computers. Of course now we have watches, wireless headsets, lol I saw an add the other day for a wi-fi water hose no hook-up required. (lol for this one).
The following references are worth looking up and reading:
- Pew Research Center, A third of Americans live in a household with three or more smartphones
- Katherine Lazarevich, The future of Smart Devices with Natural Language Processing
A number of different papers are available online about this subject. It is very interesting but scary if I was young. Things will get better. Think about a robot doctor? lol.