The VPL-VW320ES supports a maximum resolution of 3840 x 2160. That's over four times the resolution of the most common graphics resolution of 1600 x 1200 (UXGA). The worst resolution of all comparable spec projectors that were released in the last year is 640 x 480 (VGA) and the best is 4096 x 2160.
It may also be worth also looking at one of the other projectors that support a resolution of 3840 x 2160|4096 x 2160 currently available including the VPL-VW320 (£4,850.00), or the VPL-VW320 (£4,850.00) both from Sony which has a better Rating.
If the resolution of this data projector is too low for you then you might want to consider the Sony VPL-VW300ES (£3,995.00) (720 x 576|1280 x 720 (HD 720)|1920 x 1080 (HD 1080)|3840 x 2160|4096 x 2160) which is also higher rated.