I think that with a bigger and with more dots screen from now days is possible to have an idea if the image is more or less good, what I cannot say about the 2" 230,000 dots from the 1D MKii, so a good LCD screen in my opinion is very useful to do the first filter on the photos taken.
This makes perfect sense, but I think is valid to know how they compare on their biggest output as well.
I know that the number of pixels just matters depending in what you do with your images, but I fell good when I open the photo in its maximum size and it make my 24" screen look small, so I rather spend a bit more and keep this useless pleasure