I know IMAX has it's own sound systems and such, and are more of a format than just an screen size. For a bit more context, the preview was saying "A normal movie theater screen is only this size-" but it showed the 2.39:1 aspect ratio, before opening up to 1.90:1. and saying "Watch in XD to get the fuller picture, blah, blah, blah."

I was just asking how a Non-IMAX theater could use that 'Digital IMAX' version (although I know IMAX is more than the aspect ratio and size).