https://techcrunch.com/2022/07/04/xiaomi-12s-launch/

With a limited launch in mainland China today, one glance at the new smartphones from Xiaomi leaves little doubt what the smartphone is all about. A third of the back of the smartphone is dominated by a dome covering a number of cameras with one of the biggest sensors we’ve seen in a smartphone so far – a 1-inch sensor covered with Leica glass.

A lot of people – men especially – will tell you that size doesn’t matter. In the case of imaging sensors, that just isn’t the case; the glass in front of lenses can only do so much and perfect glass doesn’t exist. Bigger sensors means higher resolution, yes, but it also means that the sensors have space for  bigger individual pixels. This helps both with the cooling of the sensor and could indicate much better low-light performance.