You see posts all the time, along the lines of "I'm waiting for X effect", "is the sound quality gonna improve".
Reading a few posts got me thinking! Is there an upper limit to the sound quality, and have we reached it? Apple no longer improve the retina display on the iPad, as any improvement will be undiscernable to the human eye! Will, or have we, reached, or are we near to, a similar thing with the current line of modellers? Discuss?