not for your opinion, but for your (vague) question
. again: what are you getting at? is something missing, or are you uncertain why anybody bothers to develop new dslrs (and why anybody bothers to upgrade to them spending hard earned cash)?
maybe it is better to look at it this way: you used to have film and cameras. let's keep them separated: the camera, and the sensor. you never expected film to evolve in giant leaps from year to year, did you? if you compare evolution of film in the past 5 years _before_ digital slrs, and evolution of digital sensors in the past 5years till now, i think you must admit the digital sensors win on speed of evolution hands down (which might just mean they are still on their way to maturity, still in infancy/puberty you might say, but nevermind that). on the other hand, cameras, as photographic tools, have improved too (trying to factor out the sensor), having the "film" built in to them has changed their evolution path quite radically, it's true, but i would call that fascinating rather than disapointing. so what is your point?