don't know if this will help or hurt, but when i asked this of somebody (before i found this board) this as their answer to me:
As for 16:9, I must admit that looking cool is probably the main benefit of that feature. I don't know what you comfort/knowledge level is regarding aspect ratio, pixel ratio and size, and resolution, so this may or may not make much sense (skip this if you already know this).
Basically (and I'm leaving out a little bit of the detail here) There are multiple ways a camera can obtain a 16:9 aspect ratio. Here's the easiest to understand, my JVC JY-HD10U camera produces a 1280x720 image (720p HD). If you do the math, this is a 16:9 ratio (1280/16*9=720). The camera achieves this ratio by having as 1280x720 CCD with square pixels, and records pixel for pixel to the DV tape (in mpeg transport stream format). DV cameras capture images in various resolutions, depending
upon the CCD(s) of the camera. No matter the resolution, the image is stored to DV tape in 720x480 resolution, using NON-SQUARE (rectangle if you will) resolution. For regular 4:3 video, the aspect ratio is .9 to 1 (usually just written as .9). For 16:9, the aspect ratio is 1.2 (1.2x720=864. 864x480 = 16:9) (864/16*9=486 - close enough). Why the heck am I talking about this? For the DCR-PC100, 16:9 is achieved not by
having square pixels, but instead by cropping the top and bottom of the picture, and storing the resulting image in DV Widescreen format (1.2 or 16:9 aspect ratio). So, while you are achieving 16:9, you comprise some picture quality loss. I think with the XL1 and XL2, 16:9 can be achieved by using an "Anamorphic Adaptor". This is basically a wide angle lens that takes in more information and allows it to be stored into the
Widescreen DV format, without sacrificing detail. Does this make sense?
Now, to answer your original question, what is the advantage of using 16:9? 16:9 is the chosen aspect ration of the HD (High Definition) ATSC standard. All TV's will be in this format, as least for the next several years. In addition, I believe EDTV's, though a waste of money in my opinion, are also in this format. 16:9 is the future, for now
