The Pioneer Elite and the Sony Blu-ray players have the ability to output 1080p/24 video directly to your display. Very - VERY - few displays actually accept 1080p/24 data or display 1080p/24 correctly. The Pioneer 1080p plasma being one of the exceptions as well as a few front projectors including the Sony VP50 (pearl).
It is rumored that in an upcoming PS3 firmware release that the PS3 will also be able to output 1080p/24.
The interlacing/deinterlacing should not be an issue and should provide the best possible 1080p/60 video you could hope for on your display. Since the processing for this entirely occurs within the player, it should provide solidly clean video at the highest quality possible for 1080p/60. But, potentially 1080i/60 to your display could look just as good if your display properly deinterlaces 1080i/60 to 1080p/60.