The EIKI EK-600U supports a maximum resolution of 1600 x 1200 (UXGA). That's over six times the resolution of a 640 x 480 (VGA) projector, which is the most frequently found resolution supported by 100000:1 contrast ratio projectors that came out in the last 12 months.
A 1600 x 1200 (UXGA) graphics resolution is in fact the best supported resolution amongst all latest similar spec projectors.
A 640 x 480 (VGA) graphics resolution is the worst supported resolution across comparable types of projector.
If the resolution of this projector is too low for you then you might also want to consider the Sony VPL-FW60 (£2,451.91) (640 x 480 (VGA and cheaper)|1024 x 576 (WSVGA and cheaper)|1280 x 720 (HD 720 and cheaper)|1920 x 1080 (HD 1080 and cheaper)|1920 x 1200 (WUXGA and cheaper) and cheaper), or the Epson EB-G6270W (1280 x 800 (WXGA and cheaper) and cheaper).