The Benq SH940 supports a maximum resolution of 1920 x 1200 (WUXGA). That's over seven times the resolution of a 640 x 480 (VGA) projector, which is the most common resolution supported by projectors that came out more than two years ago. 640 x 480 (VGA) is also supported by this projector. In addition, this data projector supports a graphics resolution of 1920 x 1080 (HD 1080).
This projector's resolution (1920 x 1200 (WUXGA)) is actually the best supported resolution across all data projectors that have been available for around the same time as the SH940.
A 640 x 480 (VGA) graphics resolution is the worst supported resolution across comparable types of projector.