Elmzeh,
Thanks for jumping on the grenade to save us all on this one.
I was trying to decide whether or not to pick up MW3 ( as it's the more recent of the two). The graphics in your play through look dated. I'm wondering how you have them set? Is everything maxed out, or are you dialing some down for the sake of smooth gameplay?
Inquiring minds...
I don't know about his settings, but I played it fully maxed out. While it's not the most up to date looking game, I think it has aged well in some respects. Lightings , smoke, special effects, and character models are still decent. The gameplay and mechanics are still top notch as well.
Although the environment and textures are the parts that are severely lacking. The game mitigates it by being as fast paced as possible, although once you stand still, even for a second you'll notice it.
Even with the max AA available, (x4), there's some severe Aliasing at parts, and the game could do with some overall brighter colours. I know they went for the gritty brownish for a reason though.
Over all it handles and plays well, despite having visibly not aged well in some areas.