Text-to-Speech is so 1980s
Coming to a device near you Speech-to-Speech:
"The goal of the Speech-to-Speech Translation (S2S) research is to enable real-time, interpersonal communication via natural spoken language for people who do not share a common language. The Multilingual Automatic Speech-to-Speech Translator (MASTOR) system is the first S2S system that allows for bidirectional (English-Mandarin) free-form speech input and output."
http://domino.research.ibm.com/comm/research.nsf/pages/r.uit.innovation.html