While other LCD projectors offer wide range zooms (Sanyo is also 2:1, Epson's is 1.5:1, etc.), most DLP projectors by comparison, have only 1.15:1 to 1.3:1, allowing only a 15 or maybe 30% range, not the 100% range of the Panasonic. As a result, the Panasonic will work easily in far more people's rooms.
Here are a couple of numbers, from these, you can easily figure out distances for your sized screen. If you have a 100" diagonal 16:9 screen, the closest you can Place the PT-AX100U is 10 foot 2 inches back from the screen (measured from the screen surface to the front of the lens). Or, you can place it 20 foot, 4 inches from the screen, or anywhere in between. If your screen is larger, say 110" diagonal (a popular size), since that screen is 10% larger, then just increase the distance numbers by 10%, which would make the closest about 11 foot 4.5". These numbers, by the way, are right out of the Panasonic PT-AX100U manual.
The PT-AX100U uses the same joystick control of lens shift. For those of you not familiar, this allows you to position the image higher or lower relative to the projector's placement, without ending up with keystone distortion. The PT-AX100U offers a tremendous amount of lens shift, allowing you to have the projector (measured to the center of the lens) anywhere from slightly above the top of the screen surface to slightly below. Talk about placement flexibility. Officially the range is 63%, so if you have that same 100" screen (49" tall), 50% would be even with top or bottom of the screen. With 63% that would allow you to have the lens up to about about 6 inches above the top or 6 inches below the bottom, or anywhere in between!
I've got two images for you here. The one you see immediately below shows an image of the projector doing HDTV, with my cable company's Channel Guide on. Note down by the bottom center, where it says Time. If you click here, or on this image you will see a much larger image, that only looks at that area, about 1% of the total screen, and even with the huge image, you can just see the pixels. You have no idea how impressed I really am with this drastic improvement! And that's especially true because the overall image remains sharp. Not the sharpest ever (my more expensive BenQ is visibly sharper) but the Panasonic certainly provides good overall sharpness, and no pixel issue!
Only LCOS type projectors (as opposed to LCD and DLP), have less visible pixel structures, and not by much at all, if any. But, LCOS home theater projectors start at $5000, with Sony's VPL-W50. Sony calls their LCOS technology SXRD, which you may have heard of, since they tout it on their projectors, but also on many of their Big Screen TVs.
Thus, the PT-AX100U's performance in this regard (pixel visibility) is a major plus for home theater viewers, as now you can simply sit much closer and enjoy a clean image!