Sixteen years ago, my Amiga spoke to me. It said "Ben smells" and "Paul fan-cies Jenny Leeks".
Today, synthesised speech still sounds like a Speak 'n Spell. I want a computer to address me with "Good morning Paul, I trust you are well?" with appropriate attention being paid to tone and inflection.
What HAL9000 got right in 1968 and my Amiga 500 half managed in 1990 has hit a dead end. Dammit, I want the machine I'm using to talk to me, to explain to me in respectful and apologetic tones exactly why a 2.5ghz machine is taking forever to open another text file or IE window.