The highest resolution of the Optoma DH1017 is 1080p (1920x1080). That's over two times the resolution of the most common native projector resolution of WXGA (1280x800).
This projector's resolution (1080p (1920x1080)) is in fact the best resolution across all projectors of this age and spec.
A SVGA (800x600) native projector resolution is the worst resolution amongst comparable types of projector.
Alternative projectors that have a resolution of 1080p (1920x1080) currently available which you might also want to consider include because of it's better review score, the W1400, or the W1300 both from Benq.