In my vision of future state for enterprise applications, the 6th element is "Sensing".
I've used this term to capture how future applications will create new value for users by sensing relevance, context and personal preferences through analytics of voice, video, text, location, attention or other ambient and declarative data from the user. The ability to capture, store, index, search and analyze voice recordings is fundamental to this future state vision.
Nuance, BBN, TellMe/Microsoft, Nexidia, CallMiner, Utopy, SER, IBM and others have invested to improve STT, TTS, ASR and Speech Analytics technologies that are all critical to this "sensing" end-state.
To get a sense of the UX and VUI, check out this video clip…