The Acer S1383 supports a maximum resolution of 1920 x 1200 (WUXGA). That's 20% more resolution than a 1600 x 1200 (UXGA) data projector, which is the most common resolution supported by 13000:1 contrast ratio projectors that have been available for more than two years. In addition, this multimedia projector supports a supported graphics resolutions of 1280 x 800 (WXGA).
This projector's resolution (1920 x 1200 (WUXGA)) is actually the best supported resolution amongst all projectors of a similar spec and age to the S1383.
Amongst similar types of projector the worst supported resolution is 640 x 480 (VGA).