The Optoma EH7700 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 are a similar age to the EH7700. 640 x 480 (VGA) is also supported by this projector. In addition, this data projector support supported graphics resolutionss of 1024 x 768 (XGA), 1280 x 1024 (SXGA), 1280 x 720 (HD 720), 1280 x 768 (WXGA), 1280 x 800 (WXGA), 1360 x 768 (WXGA), 1400 x 1050 (SXGA+) and 1600 x 1200 (UXGA) and 800 x 600 (SVGA).
This projector's resolution (1920 x 1200 (WUXGA)) is in fact the best supported resolution amongst all 5000:1 contrast ratio data projectors that have been around for a comparable time to the EH7700.
The worst supported resolution amongst comparable types of projector is 640 x 480 (VGA).