There was a lot of entrepreneurial game development in this period, and a lot of really bad games. The market was saturated, the quality was not nearly as high as during the coin-op prime, not enough revenues were being recovered by the major players, and the market collapsed soon after '83. The market seemed to move past games. Computers like the Mac were released.
Only one company seemed to be quietly persevering with a steady stream of quality titles: Nintendo.