You are all missing the point in that let's take the Audya for example as shown in the demo is more then capable of sounding fantastic and in many ways better or on par then anything out today...
yes there are improvements thru the years not much but is there really anything mind blowing? sound and style wise?.......what Chas said in his post above is spot on...then ask yourself what has changed with me AS A PLAYER in the last 10 years?