The highest resolution of the VPL-VW520 ES is DCI 4K (4096 x 2160). That's over four times the resolution of the most frequently found projector native resolution of 1080p (1920x1080).
This projector's resolution (DCI 4K (4096 x 2160)) is in fact the best resolution amongst all data projectors of this spec and age.
An nHD (640x360) projector native resolution is the worst resolution amongst comparable types of projector.
What does "projector native resolution" mean?