Yup I believe they announced this at Google I/O Keynote this year actually -- they mentioned that while it might not be enough with just the audio, looking at mouth gestures can give AI enough to know what might be said by whom.
I imagine a lip reading AI would get wide usage. Managers will be wearing face masks to hide their lips. (It's probably doable now to listen with a spy-mic, but it's obvious in a way that using a normal video camera isn't).
[1] https://twitter.com/einaugenschmaus [2] http://www.sueddeutsche.de/sport/lippenlesen-im-fussball-die...