I just got back from Akihabara to look at the Hitachi, and I am seriously considering selling my Z2! They just recently set up the TX100 in the ground floor demo room along side the Sanyo Z2, Pana AE500, Sony HS-20, Epson 200 and Sharp Z200 (Matterhorn DLP). Because I already own the Z2, I really didn't want to be impressed by the Hitachi, but I have to admit that it's improvements over the Z2 were not subtle to my eyes or my wife's.
The first thing that hits you is the DEEP black level compared to the Z2 or AE500. It was very close to the Sharp in this respect, which is amazing considering the Matterhorn chip that the Z200 uses. Also, color fidelity seemed more accurate, with none of the blue/green tinge that the Z2 displays. I've owned the Z2 for about 6 months and this tinge never really bothered me, but after seeing the Hitachi I'm afraid it will aways be at the back of my mind. Skin tones on the Hitachi were also excellent.
While I was there, they had an HDTV feed of today's Seattle Mariners game (the Mariners are still big here because of Ichiro, despite the crappy season they're having). When we lived in Seattle, we used to live just a few blocks from Safeco field, so we've been to a lot of Mariners games. The colors of the stadium, field and uniforms on the Hitachi were much more like I remember them than either the Panasonic or the Sanyo. The blue of the team caps especially were spot on (Trust me, I've got 3 or 4 of them for comparison).
But like I said, it's the blacks on this projector that set it apart from all the other LCDs in the room. During the broadcast, the score is displayed inside a black box. This made it easier to compare the quality of the black on each screen. I closed down the Z2's iris all the way and tweaked the brightness, but I couldn't match the Hitachi.
Image sharpness was also superior to any other LCD unit on display. This is most likely due to the quality (and quantity) of the lens assembly. This lens is HUGE! My wife and I actually laughed when we saw it because it stood out compared to the others. I hope I never have to find a filter for this baby! This lens may in fact be responsible for the TX100's only "weakness" that I could see. The pixels seem to be slightly more visible than any of the other projectors on display. I double checked the focus on the other projectors and they were all zeroed in, but the Hitachi's pixels just seemed a little bit more "there" for lack of a better word. It's almost like the inferior lenses on the other projectors provide a automatic "defocus" that masks the pixels even when the projector is supposedly in perfect focus. The Hitachi on the other hand shows the pixel gap nice and clear. I'm sure a little defocus on the Hitachi would remedy this to some degree, but seeing the pixels so clearly was a bit disconcerting and the only negative that I could find.
Vertical banding was equal to the Z2 which was almost non-existent on the sample I saw. Fan noise was also very low and exhausts from the front mounted vent. I would rate it equal to the Sanyo in this regard.
By the way Zippo, I'm not sure about the voltage, but the OSD I saw were in English.:D ). I think you'll be very impressed with this unit when you see it. I look forward to hearing your impressions.