The Acer X112 has a maximum resolution of SVGA (800x600). That's 39% less resolution than the most frequently found native projector resolution of XGA (1024x768).
A SVGA (800x600) native projector resolution is in fact the worst resolution across all multimedia projectors of a comparable spec and age to the X112.
A WXGA (1280x800) native projector resolution is the best resolution across comparable types of multimedia projector.
There are a number of alternative data projectors that have a resolution of SVGA (800x600) currently available that you might also want to look at including the Acer X113 (£247.08) which is cheaper; or the Benq MS504 which has a better Rating.
If you are looking for a projector with a higher resolution then you might also want to consider the DX346 (£421.06) (XGA (1024x768)), or the DX325 (£310.14) (XGA (1024x768)) both from Optoma which is also higher rated.