The EB-S031 has a maximum resolution of SVGA (800x600). That's 53% less resolution than the most frequently found native projector resolution of WXGA (1280x800).
This projector's resolution (SVGA (800x600)) is in fact the worst resolution amongst all 10000:1 contrast ratio data projectors that have been on the market for around the same time as the EB-S031.
A WUXGA (1920x1200) native projector resolution is the best resolution amongst comparable types of projector.
If you are looking for a data projector with a higher resolution then you might also want to consider the EB-X25 (£472.68) (XGA (1024x768)), the EB-X20 (£399.00) (XGA (1024x768)), or the EB-945 (£498.78) (XGA (1024x768)) all from Epson.