I agree--I personally think that having the mp3 player gives Sony another "check" in the features column. And they already had their technology there, so it was pretty easy to incorporate it into the 650s/950s.
But, I think Sony's misstep is not having built in wi-fi for the 650. I think Sony would have been far better off to include wi-fi and no mp3 player. I personally don't miss the wi-fi, but I know that is a major selling point for a lot of folks who will not even consider the 650 because of the lack of it.
dordale