Originally posted by ElJamoquio A samsung sensor would be great if it was better than the Sony's.
Sensors haven't really been improved since 2010, though, so I'm not holding my breath.
There's been a couple of test photos lately... same condition, more or less. Sony A77 Mk II, Samsung NX-1 and Nikon D750. In all but low light the Samsung seems to have won, and in low light the Samsung, while clearly beaten by the Nikon, looks better than the Sony to me. That's with JPEGs though, I'd love to see the raw files...
The advantages of the NX-1 sensor are less space between the pixels (thinner/finer structures, by a factor of at least 2), BSI technology (the photosites are covering most, if not all of the area designated for a pixel... all the electronics etc. are on the other side, whereas in normal sensor they'd be taking away precious space), faster readout speed, lower power consumption/heat development (thinner/finer structures) --> less noise, improved micro lenses catching even more light, and IIRC less space between the micro lenses and the photosites, so that even light rays coming in at a sharp angle will be captured. New lenses are designed for sensors that can't do that, but old ones should benefit.
Now the fast readout speed may not be that useful without the processor to make use of it, but the ability to gather light more efficiently for example would still be quite valuable.
Sony does have BSI tech, but only in much smaller sensors.
There are more companies that produce sensors, like CMOSIS, but they are really expensive (CMOSIS has an APS-C sensor for 1300 Euro...).