The highest resolution supported by the PT-RZ475 is 1920 x 1200 (WUXGA). That's over seven times the resolution of a 640 x 480 (VGA) data projector, which is the most common resolution supported by projectors that have been around for a comparable time to the PT-RZ475. 640 x 480 (VGA) is also supported by this multimedia projector. This projector also supports a graphics resolution of 1920 x 1080 (HD 1080).
A 1920 x 1200 (WUXGA) graphics resolution is actually the best supported resolution across all projectors of this spec and age.
A 640 x 480 (VGA) graphics resolution is the worst supported resolution across similar types of projector.