Of course it's obscene, Diki...but, it's just business as usual...ha ha!
Plus, not much, if any, competition in that rarefied market...the CVP series has always sold very, very well.
A P-105 midi'd to an S950 or Tyros4 isn't going to look as good in the music room, unless you can manage to cobble together a decent cabinet, or have one made for you...some people just have to have the look, and Yamaha just happens to give them what they want...at a big fat price (and big fat profit for Yamaha) of course.

Style still means a lot to some people or we wouldn't see Rolls Royce and Big Mercs when a cheaper, simpler, more plain automobile would suffice.
I'm not certain, but I believe Roland still make the equally over-priced KR-series....the grand piano version (discontinued, I suspect) was a real looker, but wasn't as well made (sturdy) as the price warranted, as Roland don't actually make real pianos. It was a good effort nonetheless. I thought the action was very authentic.
Overpriced? You bet!
I'm glad that, at least in my case, function trumps style every time, especially when it comes to musical instruments.
I hope Yamaha decides to upgrade the next DGX to at least S750 type specs, but I don't think I'll count on it too much.
Ian