Are future improvements in Amp/PreAmps slowing to a crawl?

Yes in "some" cases they are engineering the musicality right out of them because too many audiophiles are demanding more detail from their gear. Excluding Class D amps how much more positive advancements are left to improve upon both in preamp and amp designs? I know there are different topologies applied to some designs and when you purchase a certain  piece you are agreeing with the designer on what he thinks sounds good.

Just maybe twenty years from now people will searching to buy the gear you own right now because what they are currently dealing with sounds like crap.

Shadorne , I'm sure you already know, specifications shouldn't be used as an indicator on what sounds good. and you also know there is gear that have terrible measurements but sound spectacular. Plus you right, you can't measure musicality but you just know its there when you hear it.

geoffkait, that's definately a different but interesting approach but how were you able to get rid of the house ac?