Similar statements could be made for desktops, where tray icon pop-ups for updates, email and chat notifications distract and interrupt workflows.
Popups and notifications are high on my list of things we can do without. If I am sitting at my computer it means that I am there to accomplish a specific task. I do not welcome interruptions on my computer any more than I appreciate robo-calls when I sit down to dinner.
Highest on my list are those dialog boxes that pop up after selecting an option that say "Are you sure you really want to do that?"
Yes, I am you fucking retard that's why I clicked the button in the first place and to think that someone had to program this functionality in means you are probably trying to see how far my blood pressure will rise today and I will tell you this, programmer, you are playing a dangerous game thinking I am sane and rational but I'm not, really, deep down, I have it in me to track you down....
Anyways you get the point. I am not a big fan of interruptions to my workflow.