The highest resolution of the Acer H9505 is 1080p (1920x1080). That's over two times the resolution of a WXGA (1280x800) data projector, which is the most frequently found resolution.
This projector's resolution (1080p (1920x1080)) is in fact the best resolution across all 10000:1 contrast ratio data projectors that came out around the same time as the H9505.
The worst resolution across similar types of projector is SVGA (800x600).
Other multimedia projectors that have a resolution of 1080p (1920x1080) currently available that you might also want to look at include because of it's better review score, the D966HD ($1,185.99), or the H1180HD ($799.00) both from Vivitek or the Benq W1300.