Photos like these are useless. Notice how each computer is in a completely different place in relation to the camera, thats not a good comparison.
Also, who watches their computer so far off center?
Viewing angle can often be a good indicator of the quality of the panel.
I'd argue that in neither photo are the two machines “in a completely different place in relation to the camera”, this is particularly the case for the first image. The Air has deeper blacks, richer colours and the backlight is brighter.
Anyway, the fact remains that the MacBook has a feeble screen compared to the Air and Pro. If you don't believe the photos, then go and compare in real life. The MacBook screen is not bad, it's perfectly workable, but it's not in the same class as those used in the higher end products.
Here's another comparison, from gizmodo again, this time head on:

Pro vs MacBook