What is it you expect to hear from hifi gear that you have not yet?

That cue that I hear from real musicians playing. It could be the kid next door practicng his trumpet inside the house or a high school band playing in the mall or on the football field...you immediately know it’s really people playing real instruments. I haven’t heard that yet from any HiFi rig.
But I keep on pushing on!
Cheers,
Spencer