The highest resolution of the NEC P401 is WXGA (1280x800). That's 30% more resolution than a XGA (1024x768) projector, which is the most common resolution.
A WXGA (1280x800) projector native resolution is in fact the best resolution across all projectors of a comparable age and type to this projector.
Across comparable types of projector the worst resolution is XGA (1024x768).
What does "projector native resolution" mean?