Commonly added features are IR Sensors, video cameras, speech recognition chips, stronger motors, microcontrollers, sonars and other advanced enhancements that would not have been possible in the 80s.
The passage describes common additions to modern devices compared to those of the 1980s. These include features like infrared sensors, video cameras, speech recognition chips, stronger motors, microcontrollers, sonars, and other advanced technologies that were not available in earlier times.