The point is to playback the music in the same bit depth and sampling frequency it was recorded and mastered in
On the side of the guys actually mixing amd mastering the work, there are advantages for various works. It's not 'just' marketing fluff. However there is the issue or lables and even ill informed artists going for lesser, more crunched mixes as opposed to a variation that actually takes advantage of all that technical stuff that 'normal folk' would rather be onlivious to.
A good example would be Fallujah's second album years back. On a thread at MetalSucks the peanut gallery had the audacity to trash the mix amd even attempt attacking a special guest. The actual engineer dropped in and educated the clowns who literally were using huge terms entirely out of context and have no idea of how that process works.... similar to the op that clearly would rather male due than to really dive in to how audio works.