I'm a photographer, never took my lenovo t40 for a serious photo retouch machine (quick field work I mean).
Well, it had a matte screen with false hues, no blacks almost, no sharpness, no tonal scale worth considering.
After I got a replacement au screen (glossy) I got rich blacks, wide tonal scale, realistic hues with a capability of discriminating between skin tones and different types of chips (eg nikon, sony, canon).
For quick work to show off on flickr or advanced amateur work it is really enjoyable and useful.