The NP-PA550 supports a maximum resolution of 1920 x 1200 (WUXGA). That's over seven times the resolution of the most common supported graphics resolutions of 640 x 480 (VGA) (which is also supported by this data projector). This projector also support supported graphics resolutionss of 1024 x 768 (XGA), 1280 x 1024 (SXGA), 1400 x 1050 (SXGA+) and 1600 x 1200 (UXGA) and 800 x 600 (SVGA).
A 1920 x 1200 (WUXGA) supported graphics resolutions is in fact the best supported resolution amongst all projectors that have been on the market for more than two years.
Amongst similar types of projector the worst supported resolution is 640 x 480 (VGA).