The CP-S240 has a maximum resolution of SVGA (800x600). That's 53% less resolution than a WXGA (1280x800) multimedia projector, which is the most frequently found resolution. The best resolution of all comparable spec projectors that have been available for a similar time to the CP-S240 is DCI 4K (4096 x 2160) and the worst is nHD (640x360).
Alternative projectors that have a resolution of SVGA (800x600) that you might want to also look at include a higher rated product such as the Epson PowerLite Home Cinema 500 (£214.58), or the Acer X1173.
If you are looking for a projector with a higher resolution then you might want to also look at the Aiptek MobileCinema Q20 (540p (960x540 and higher rated) and higher rated), or the Hitachi CP-X250 (XGA (1024x768 and higher rated) and higher rated).