Yesterday I went into my local Sonystyle store and they had the 60A2000 set up where the 60XBR1 used to be. The XBR1 was previously hooked up to the prototype Sony bluray player. I have gone into sonystyle numerious times and watched the XBR1 on their bluray demo. Ive watched the Kill bill demo of stand def vs hi def numerous times, as well as the Spiderman 2 train scene which is mind blowing.
In short the A2000 looked better. Where I saw the most noticable difference was on the menu screen. The white lines we're clearer around each menu button. The sony employee who I've been dealing with for the past couple weeks said he saw a difference on all the scenes. We watched the spiderman 2 demo and the colors poped out just as much as the XBR1, for example on spidermans suit. I really couldnt see much of a difference during the train scean, but its is a pretty fast moving scene. The sony guy was postive he saw a little bit of a difference, but I couldnt tell. Im pretty sure some of you guys who are very critical and know what to look for better then I do, might of been able to see something.
I also saw a little bit of difference during the trailers when the blue text came up. "beyond high definition" ect ect. This was only when I got closer to the TV though. Nontheless if the menu screen and lettering looks better, its an indication that the A2000 must be a little bit better then the XBR1 when recieving 1080p signals. I also bet the Sony bluray player is a lot better of then Samsungs player, even though its a prototype.
So in short I think the 1080p HDMI ports offer it an adge over the XBR1. It may not right now, but in the future when 1080p comes more common with things like PS3 it will.