As to why, the computing becomes more a part of your mind and body, augmenting or modifying you. So I could have a live feed of tweets news or cryptocurrency values. So when you have that on your mind all the time, you know why you want or don't want these. Perhaps biofeedback or a text adventure or an AR game or lichess. One of the main takeaways was that I vastly preferred an bidirectional audio interface when mobile as when you walk around you are more dependent on the visual field and don't want computing interference at the same time. An audio desktop.
I desperately want to have in peripheral vision, my RSS feeds, and maybe a chat window. Maybe a Lynx text browser.
I don't know WHY I want it, but that's part of innovation isn't it? Finding new ways to use tools...