The highest resolution of the Sony VPL-VW300ES is DCI 4K (4096 x 2160). That's over four times the resolution of a 1080p (1920x1080) projector, which is the most common resolution.
This projector's resolution (DCI 4K (4096 x 2160)) is in fact the best resolution across all comparable spec projectors that came out more than a year ago.
The worst resolution amongst similar types of projector is nHD (640x360).
What does "projector native resolution" mean?