There are some niceties about inline completion (like spelling out a log message that's obvious from the surrounding code) but I don't get the hype much beyond that.
Maybe I'm missing some feature though ...
Windsurfs on the other hand are much better. The only issue is that windsurf is super aggressive about them, but it is able to do do things like "the user made a change on this line, he most likely also want to make the change here".