Why do we IVTC if our DVD players are just going to insert pulldown so that our TVs can display the 29.97 interlaced image? Does the 24p help with software DVD playback on a PC (no deinterlacing required?), or maybe over an LCD projector? Perhaps to preserve it in its original form for the future? Or is it just to save space when compressing to MPEG-2? All are fine reasons. I'm just asking because I'm getting some artifacts with Decomb on my Waterworld edit, and I wonder if it would have been better to just leave the footage as interlaced 29.97 fps.