The Epson VS340 has a maximum resolution of XGA (1024x768). That's 23% less resolution than the most frequently found native projector resolution of WXGA (1280x800).
An XGA (1024x768) native projector resolution is in fact the worst resolution amongst all data projectors of this age and spec.
The best resolution amongst comparable types of projector is 1080p (1920x1080).
If you are looking for a projector with a higher resolution then you might want to look at the EB-W32 (£453.43) (WXGA (1280x800)), the EB-W31 (£315.30) (WXGA (1280x800)), or the EB-W04 (£341.33) (WXGA (1280x800)) all from Epson which also has a higher rating.