I know nerds don't care, but this is actually a big thing.
Modems and routers are a huge black box for the vast majority of the population, which is a shame considering the internet is a big thing for almost everybody. Having the internet is basic, actually setting up the internet and resolving problems is extremely complicated.
Airport base stations, and the Airport utility, brought incredible simplicity to this whole situation. But I can still imagine my grandmother not even being able to describe what she's seeing over the phone to me, should anything go wrong.
With this, literally anybody can see what part of their network is having a problem, take control and fix it without having to know anything.
I know nerds hate control taken away for simplicity, but for most people finding what's wrong with their router isn't a sport, most people don't want to dedicate hours of problem solving for what should be simple things.