In the last few months, smartphones with cameras of 40 or 48 megapixels have begun to appear, and these sensors are integrated in mid-range devices, the Xiaomi Redmi Note 7 is the most specific example.
Things do not seem to stop here, Judd Haipe (senior product manager, Qualcomm) said that this year they have many chances to watch phones with 64 or 100 megapixel cameras. The current Qualcomm processors (Snapdragon 660, 670, 675, 845 or 855) support a resolution of 192 megapixels, so the hardware capabilities already exist.
However, the logic behind these many megapixels is to combine 4 pixels into one. Practically, 48 megapixel cameras can create a detailed 12 megapixel picture. This technology is called Pixel Binning and allows you to collect more information for a more detailed photo (including more low-light information for low image noise).
The same Qualcomm official noted that the next leading processor (probably Snapdragon 865) will provide support for HDR10 video.