It can, but some now common graphical special effects and lighting techniques don't work because they need to know which pixel belongs to exactly which object on screen, while that gray pixel is part of both the black and the white object.

It's kind of complex, but generally thought the overall look with those effects without antialiasing is better than without the effects but with antialiasing.

There are workarounds that give something similar to real antialiasing that work with those effects, or if you have lots of GPU power but a low res monitor you can do what OP asks and Renee a larger screen that you realize down.