Is the 'depth' and 'pop' that Art raves about partly the result of FI? Is it still the same with FI off?
I'm curious to see how FI works on projectors. On flat panels, it does make things look too much like video. I watched DVD of an old B&W film on my Sony 52WL140 with "motion enhancer" set on high and it looked like I was watching a pristinely preserved 50's TV show. Rather odd. Occasionally, the motion enhancer got confused or failed to keep up and I saw stutters and breakups that looked worse than the usual judders. It works better on HDTV content.
Since LCD flat panels tend to make everything look more video-like anyway, I think FI just pushes the effect over the top. I think FI may actually work better on front projectors, which tend to make everything more film-like. FI may nudge projectors towards the video end of the spectrum and give LCD PJs the depth and pop of DLP PJs which some (including me) like. Unfortunately, it also makes the motion too smooth and look unnatural to eyes accustomed to something else.
But FI is still new and there are lots of refinements they can do to get a nice balance.