The highest resolution of the Canon X320 is XGA (1024x768). That's 23% less resolution than the most common native projector resolution of WXGA (1280x800).
An XGA (1024x768) native projector resolution is actually the worst resolution amongst all multimedia projectors that were launched around the same time as the X320.
Amongst comparable types of projector the best resolution is WUXGA (1920x1200).
Projectors with a higher resolution that might also be worth considering include the Canon LV-WX320 (£365.16) (WXGA (1280x800)), the Ricoh PJ WX2240 (£274.10) (WXGA (1280x800)), or the Benq TH670 (£400.99) (1080p (1920x1080)).