The Optoma EH319UST has a maximum resolution of 1080p (1920x1080). That's over two times the resolution of a WXGA (1280x800) data projector, which is the most frequently found resolution.
This multimedia projector's resolution (1080p (1920x1080)) is in fact the best resolution amongst all similar spec data projectors that have been available for a comparable time to the EH319UST.
The worst resolution across similar types of multimedia projector is SVGA (800x600).
It may also be worth considering one of the other data projectors that have a resolution of 1080p (1920x1080) currently available including the HD161X, or the HD50 both from Optoma which has a better Rating; or the Optoma EH319USTI ($1,838.00) which is cheaper.