On the back of this Blu-Ray disc, it specifically says "16x9 Widescreen Version."
I prefer the 16x9 widescreen because it "fills" the entire screen on a 16x9 screen -- bigger picture. And in my opinion, allows for a greater appreciation of detail.
Yet it doesn't fill the screen, you still get those black bars at the top and bottom, and the smaller widescreen picture. Then I looked at the back again, and at the bottom, it says "2.35:1" widescreen. So which is it, 16x9 or 2.35:1?
Perhaps I've got it confused, and it is "16:9 aspect ratio" that ensures that your entire screen is filled.
Personally, I think all Blu-Ray/HD-DVD's should have the 16:9 widescreen format, since you'll most likely be viewing high-definition movies on a 16x9 HDTV. I think if you're spending $10 more on a "high definition" disc, you should get your money's worth. That's all I'm saying. And they shouldn't mislead you on the box information.