There are four companies that can do almost all of the tech in-house (sensor, processor and so on). Those are Sony, Canon Panasonic and Samsung. And if the rumors reported at Mirrorlessrumors are correct than Samsung just decided just killed the entire camera business on a manager meeting held in July.
UPDATE: Samsung just released an official statement at Imaging Resource:
“Withdrawing from the camera business is not true and there is no official plan to stop production of cameras and lenses. Samsung continuously analyzes the varying needs and requirements of consumers in each market and region very carefully. However, we do not officially comment on rumors or speculation.“