The highest resolution supported by the CTHD-61B is 2560 x 1600 (WQXGA). That's over thirteen times the resolution of a 640 x 480 (VGA) projector, which is the most common resolution supported by multimedia projectors of this spec and age. 640 x 480 (VGA) is also supported by this Barco projector.
This data projector's resolution (2560 x 1600 (WQXGA)) is in fact the best supported resolution across all projectors that were released one year ago.
A 640 x 480 (VGA) graphics resolution is the worst supported resolution amongst comparable types of data projector.