Expensive systems in well designed listening room do scale type things better. They can go louder, sound bigger, thunder in the bass and shimmer the highs. But does that really correlate with listening to music better? Sometimes yes, sometimes no.
From the extreme high end systems I have heard, they do a lot more things better than the things you mention.
The most recent I heard was a pair of Estalon Forsa, driven by Pass labs, and besides the things you mentioned, there is an overall effortlessness that most speakers at this price and quality range exhibit, that goes beyond any specific one attribute.
Yes, they produced a realistic scale soundstage of an orchestra as if I was sitting 10 rows back, but they also were able to produce an intimate singer/guitarist performance as if I was I was sitting in the original room with the performer. I could even tell they when they were standing, or sitting on a stool.
This is just the tip of the iceberg.
And of course it is "Sometimes yes, sometimes no". Not every high priced speaker is equal, not every high end speaker works well in a particular room, or with all equipment.