I cannot even watch streaming tv or movies on it as it sounds so bad.
But I put in a 4K UHD disc and wow. It sounds better than a real movie theater.
I just think most people are never exposed to what high end movie audio sounds like anymore. I can tell you that channel separation is as good as ever. It's just most people never realize what's possible at home or don't have a room conducive to the setup. Or frankly don't care. My wife loves good movies and she could care less about the sound quality.