Problem: Currently you only receive notifications when you are logged into a browser, or depending on your preferences per Email. When you write someone a message, you often don't get an answer for a long time because the recipient doesn't notice. Newbies who have logged out often disappear entirely without realizing that someone has written them a message on their talk page. Communication falls by the wayside, and unfortunately so does the workflow. That has to be changed!
Who would benefit: Everyone. Long-time editors whose communication is improving, as are new editors who are more involved. It just makes a lot of things easier.