The PT-VX500 supports a maximum resolution of 1920 x 1200 (WUXGA). That's over seven times the resolution of the most frequently found graphics resolution of 640 x 480 (VGA).
A 1920 x 1200 (WUXGA) graphics resolution is actually the best supported resolution amongst all multimedia projectors of a comparable age and spec to the PT-VX500.
The worst supported resolution across similar types of data projector is 640 x 480 (VGA).
Data projectors with a higher resolution that might also be worth considering include the NEC NP-P451 ($1,799.00) (1280 x 1024 (SXGA and higher rated)|1280 x 800 (WXGA and higher rated)|1400 x 1050 (SXGA+ and higher rated)|1600 x 1200 (UXGA and higher rated)|640 x 480 (VGA and higher rated)|800 x 600 (SVGA and higher rated) and higher rated); or the Hitachi CP-A302WNM (1024 x 768 (XGA and cheaper)|1280 x 1024 (SXGA and cheaper)|1400 x 1050 (SXGA+ and cheaper)|1440 x 900 (WXGA+ and cheaper)|1600 x 1200 (UXGA and cheaper)|640 x 480 (VGA and cheaper)|800 x 600 (SVGA and cheaper) and cheaper).