The Benq MX717 supports a maximum resolution of 1600 x 1200 (UXGA). That's over six times the resolution of a 640 x 480 (VGA) data projector, which is the most common resolution supported by comparable spec projectors that have been available for a similar time to the MX717. 640 x 480 (VGA) is also supported by this data projector.
This projector's resolution (1600 x 1200 (UXGA)) is in fact the best supported resolution across all 5300:1 contrast ratio projectors that have been around for a similar time to the MX717.
A 640 x 480 (VGA) supported graphics resolutions is the worst supported resolution across comparable types of projector.