The NEC P501X supports a maximum resolution of 1920 x 1200 (WUXGA). That's over seven times the resolution of a 640 x 480 (VGA) multimedia projector, which is the most frequently found resolution supported by similar spec multimedia projectors that have been around for a comparable time to the P501X. In addition, this projector supports a graphics resolution of 1024 x 768 (XGA).
A 1920 x 1200 (WUXGA) graphics resolution is actually the best supported resolution amongst all 4000:1 contrast ratio data projectors that have been available for around the same time as the P501X.
A 640 x 480 (VGA) graphics resolution is the worst supported resolution amongst comparable types of projector.