The highest resolution of the Acer X113PH is SVGA (800x600). That's 39% less resolution than the most common native projector resolution of XGA (1024x768).
This multimedia projector's resolution (SVGA (800x600)) is in fact the worst resolution amongst all 13000:1 contrast ratio multimedia projectors that have been around for more than a year.
The best resolution amongst comparable types of multimedia projector is WXGA (1280x800).
If the resolution of this multimedia projector is not high enough for you then you might also want to look at the X123 (XGA (1024x768)), or the X122 (XGA (1024x768)) both from Acer or the Benq MX806 (XGA (1024x768)).