> In 2004, in our earliest study, we found that people averaged about one hundred fifty seconds (two and a half minutes) on a computer screen before switching their attention to another screen

Maybe it's just me, but I look at several different screens each day (Phone, Workstation, Raspberry Pi for home network logging using Pi-Hole, and a tablet). Not to mention our main TV. This is all normal for people these days. One screen for everything doesn't cut it, unless you are very disciplined and force yourself to use one device for everything, but I don't see the main purpose of that.

Maybe if you're running a business with tricky logistics, you need to be pinned to a single device and need real-time interaction with your systems to get things done?