If you know anything about digital photography, you know that 5MP is plenty big enough; I've seen a study where they tested people to see if they could see the difference that extra megapixels made in highly enlarged photos, and the vast majority couldn't even tell the difference.

I personally don't want gigantic 8 or 10 megapixel photos jamming up my memory cards.

The question is not, "How many megapixels?" but, "what kind of optics?" and you can't learn about that from the kernel source.

EDIT: The other problem is sufficient lighting, and that usually means a flash. And a flash is a real battery drainer.


Some interesting reading:
The Megapixel Myth
Do Megapixels Make A Difference?