There's a lot of difference between 1.3mp and 5.3mp, lol. You'd need a larger, higher quality lens, and seeing as decent 5mp+ cameras alone are around £200 I think a phone with one would cost a lot more.
My first digital camera, which came with my pc in late 99, was 0.8mp and was crap, the last I had was 3.1mp and now this one is 5.3mp, and each time there is a noticeable difference, it's not just a meaningless number.
It would be pointless really having such a high quality camera on a phone, when most of the pictures need to be sent so thus need to be small, and are only often viewed on little screens anyway.
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