The PT-TW330 has a maximum resolution of 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 amongst all projectors of this age and spec.
An XGA (1024x768) projector native resolution is the worst resolution across similar types of data projector.
What does "projector native resolution" mean?