Got myself a PS3 for Christmas and it's beautiful. Though I've only really rented the Dark Knight to see how it looks on Blu Ray (my family has a 1080i 50 inch). It was so good it almost gave me another seizure that's how much detail was in the picture. The funny thing is they really used the whole disk for the Dark Knight (50 GB) and put the special features on a seperate disc.
At this point though Sony is probably wondering why the Blu Ray isn't taking the world by storm when to fully utilize a Blu Ray you have to get a player in which the cheapest is around $200. Then you have to make sure you have a TV thats at least 720p which can run you up another $1,000+ then if that wasn't enough you have to pay around $30 per movie. But hey the picture is absolutely fantastic. So technically to watch the Dark Knight on Blu Ray you have to pay at least $1,230 and thats being cheap. Maybe $1,208 if you rent it.
Still the picture really is unbelievable especially the scene in the Dark Knight where Batman takes on the Joker for the first time in the movie.