The highest video resolution of the HD Emotion is 1280 x 720 pixels. That's over three times the video resolution of a 640 x 480 pixels webcam, which is the most common video resolution. The worst video resolution of all webcams that were released around the same time as the HD Emotion is 640 x 480 pixels and the best is 1920 x 1080 pixels.
There are a number of other webcams that have a video resolution of 1280 x 720 pixels currently available that you might also want to look at including the Logitech C930e (£79.19) which has a better Rating.
Webcams with a higher video resolution that might be worth considering include the Logitech CC3000e (1920 x 1080) which is also higher rated.