Still, I find it hard to fathom why the iPad only has 256MB of RAM, for example -- the cost difference between 256 and 512 MB of RAM is very small. More RAM wil

Still, I find it hard to fathom why the iPad only has 256MB of RAM, for example -- the cost difference between 256 and 512 MB of RAM is very small. More RAM will consume marginally more power, but that doesn't seem a convincing reason either.