The Acer X133 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 13000:1 contrast ratio projectors that are a similar age to the X133. In addition, this data projector supports a graphics resolution of 1280 x 800 (WXGA).
A 1920 x 1200 (WUXGA) graphics resolution is in fact the best supported resolution across all 13000:1 contrast ratio projectors that have been on the market for around the same time as the X133.
The worst supported resolution amongst comparable types of projector is 640 x 480 (VGA).