I don't like using my laptop to work on my photos. I also don't like to critique photos using the laptop either. I don't trust what I see on my laptop at all. Move it a fraction and the image changes - it's either too dark or too light.
I am happy with my screen on my PC, and I usually use it for most of my photo-work. I bought a new larger screen a year ago and I like it very much.
My two cents too :)