What is required to add emotional layer on top of personal assistant technology to become capable of interacting with people beyond information sharing?

What is required to add emotional layer on top of personal assistant technology to become capable of interacting with people beyond information sharing?

The technology for this exists today; think reverse sentiment analysis.  However, the will to implement it, or perhaps the demand for it, is lacking.  Also, better hardware solutions for increased sensory input, or embodiment, such as computer vision, will improve future implementation.

See also my Quora answers to:

• What steps are being taken toward developing artificial emotion in machines, computers, and robots?
• What are the best sentiment analysis tools?
• How does one begin to study and research the possibility of emotions in machines and artificial intelligence?
• What is the current relationship between prosody in linguistics, speech recognition, and affective computing?