IMAX Digital is in no way similar to the traditional 15 perf 70mm film version. The resolution is apparently only slightly better than standard 2K digital cinema, and the screen size is dramatically smaller.
From what I gathered, large projection size is a main benefit of the Kodak technology.
I do use a digital device in my photographic pursuits when necessary.
When someone rags on me for using film, I use a middle digit, upraised.