Computers and software have become powerful enough that it is now possible to have them sing a song on a melody and lyrics you write. (Vocaloid by Yamaha). The quality is not yet that of a diva, but the result is acceptable enough for trying out songwriting ideas.
This “text to speech” technology could be interesting for presentation design as well. If a computer voice can read out your pitch with a convincing intonation, you could test out your ideas without having to contract a voice actor (which you would never do for an everyday business presentation).
When you glance over a sentence in a document for the 100th time, you are not really reading it anymore, you just check the latest edit you made. Hearing the whole thing out loud, can wake you up to the fact that it has become bloated, fluffy, loaded with jargon, buzzwords, and boring.