Once again, Dan's Data has an article on this

by MightyDrakeC - 3/24/13 11:52 PM

In Reply to: confused about camera resolution by clearasmud

This reminds me of the South Park episode, "Simpson's Did It."

Dan's Data "Enough already with the megapixels"

The short version is the same as others have posted here. The physics of a small lens cannot resolve to that level of detail. And, the physics of the small sensor with teeny light receptors inherently produces a snow storm of noise.

Drake Christensen