Even at that size, a 108-megapixel sensor will have ridiculously small pixels. By default, though, Samsung's Tetracell tech will gather the light from four pixels, transforming it into a 27-megapixel sensor. You'll still be able to snap 108-megapixel photos if you want, but that will likely require brightly lit shooting situations.
Samsung's Smart-ISO mechanism will automatically select lower ISOs in brighter light, and high ISOs in dim shooting situations. Hopefully, Xiaomi will give users manual control over those settings, as well. Along with the high-resolution and low-light photo shooting, the sensor will allow for 6K movies at 30 fps (6,016 x 3,384), an incredible feat for a smartphone camera.
Samsung's latest smartphones have been criticized for inferior low-light performance compared to the Huawei P30 Pro and other models that use Sony chips. By simply boosting the size of the chip, Samsung can effectively remedy that problem. At the same time, bigger smartphone sensors give consumers another reason not to buy compact cameras. Production of the new chip will begin later this month, Samsung said.