Well really, all of the above: It was sharper, there was little or no noise (depending on the disc we watched as some had grain of course). There wasn't any of that slight
haze that could be seen on the X35 and X55 in bright scenes (I daren't use the term ANSI contrast considering the other thread, but you get the idea?). In some ways a bit like some kind of 4K Darbee effect, where the 'off' effect was the other JVC projectors (which were in equally dark pit rooms) and the Sony was 'on' (the X35 was connected to a Darbee too, so already had a helping hand so to speak).
We didn't view any sport on it, but I could image it being like watching from corporate box literally through a window: Some of the content we viewed certainly gave this impression. I can't remember what the screen was now, but it wasn't a high gain screen despite it's size which was about 4 metres across IIRC, the high (black) ceilings and dark surrounding walls were a long way out from the screen as it was a huge room which meant there wasn't washout of the screen due to reflections: Not one of those magnolia painted
dedicated rooms sometimes seen in magazines, but the real thing, which actually looked very tasteful when the lights came up.
Knowing that you can watch one of these on a daily basis, I have to say I'm a tiny bit jealous Mark.