Some rough numbers:

The paper says that reconstructing an actual image from the raw data produced by the sensor takes ~58ms of computation, so doing it for 10,000 sensors would naively take around ten minutes, though I'm sure there's room for optimization and parallelization.

The sensors produce 720x720px images, so a 100x100 array of them would produce 72,000x72,000px images, or ~5 gigapixels. That's a lot of pixels for a smartphone to push around and process and store.

72,000*72,000* say, 24 bits per color * 3 colors, equals ~43 GiB per image.

edit: mixed up bits and bytes