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4096 x 2160 color pixels isn't that much handy. For Sun - mono wins (narroband H-alpha, or narrowband with Solar Continuum in white light). For Lunar infrared filters are usually used. For planets so many pixels aren't needed.
As for the IMX121 sensor. It has 1.55 micrometer pixels. This is very very small. At around f/6 it will be at theoretical max scope resolution. Other IMX sensors available in USB3 Flea 3 or QHY 132E and other cameras turn out quite poor, so this newer, but with even smaller pixels doesn't look "interesting".
It also has rolling shutter which isn't the best thing - if the image is unstable you will get artifacts.
In the CMOS branch really interesting for Solar System imaging are only e2v Ruby/Sapphire and CMOSIS CMV sensors. Micron and IMX are in the "entry level" branch.
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