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There is zero purpose in having a 48 megapixel camera unless you are intending to blow-up you photograph to an extremely large size. None. It’s pure marketing hype.

The way they "pack in" that many photo receptors is by making them four times smaller than the photo-recptors in a 12 megapixel camera. . . Which meany that unless they have some magical way of multiplying light, four times less light will fall on each pixel to trigger it to release electrons or allow them to pass. There are only two ways to do that, bigger lenses, or fewer lens surfaces (each of which absorbs some light) for image light to pass through. Each correcting lens adds two surfaces. . . as does the cover lens.

So, if you are interested in printing 36” x 22" billboards at ~300 DPI at the perfect resolution of an 8x10, then you might want a 48 mp camera, but then you want one with a huge CCD with full size light receptors you’d field in a DIGITAL SLR, not the itty-bitty ones you can stick in the miniature camera a cellular phone has room to allow. . . so the user can take selfies to post on a 6" screen.