I'd like to add
Shallow DoF photography
What matters here is sensor size divided by f-stop number. You can only make good lenses up to about f/1 and it seems cheap lenses are stuck at around f/2. If you want to go shallower, you have to increase the sensor size.
Or to put it the other way around: A full frame DSLR with a f/5.6 lens could be replaced by a camera phone with an f/1 lens of shorter focal length and a chip of 8mm diagonal and produce THE EXACT SAME PICTURES (or even better because it has higher quantum efficiency and less read noise).