From GUI to E(motional) UI

How ironic that we think we can get more exact results from our computers by emulating human interaction, but when we want exact results from human interaction, we unintentionally emulate computers. Engineering, air traffic control, legal contracts--in all endeavors where precise communication is critical--our success has depended on washing out human emotion and natural language in favor of formal procedures and protocols, complete with a detailed domain-specific language.

Agro, Leandro. UXmatters (2006). Articles>User Centered Design>User Interface>Emotions