The most display resolution of the S22A450 is 1680 x 1050 pixels. That's 15% less display resolution than the most frequently found display resolution of 1920 x 1080 pixels. The display resolution of all PC screens that have been around for a similar time to the S22A450 ranges from 1366 x 768 pixels (worst) to 2560 x 1600 pixels (best).
Other PC displays that have a display resolution of 1680 x 1050 pixels currently available which you might want to look at include because of it's better review score, the Lenovo LT2252P (£83.99).
If you are looking for a flatpanel monitor with a more display resolution then you might want to look at the DELL 2007FP (1600 x 1200), the HP LP2065 (£110.40) (1600 x 1200), or the LG 22M35 (£81.75) (1920 x 1080) which also has a higher Rating.