The PT-DZ10 has a maximum resolution of WUXGA (1920x1200). That's over two times the resolution of a WXGA (1280x800) multimedia projector, which is the most common resolution.
A WUXGA (1920x1200) projector native resolution is in fact the best resolution amongst all projectors of this age and type.
Amongst comparable types of data projector the worst resolution is SVGA (800x600).
What does "projector native resolution" mean?