The highest resolution supported by the PT-EW730 is 1920 x 1200 (WUXGA). That's over seven times the resolution of a 640 x 480 (VGA) multimedia projector, which is the most common resolution supported by 5000:1 contrast ratio data projectors that have been available for a similar time to the PT-EW730. 640 x 480 (VGA) is also supported by this data projector.
This projector's resolution (1920 x 1200 (WUXGA)) is actually the best supported resolution across all comparable spec multimedia projectors that were released more than two years ago.
A 640 x 480 (VGA) graphics resolution is the worst supported resolution across comparable types of projector.