I'm getting comfortable with talking to my watch. Its pretty discreet if you do it correctly. The mics on these things are very sensitive, so you don't have to yell. In fact, whispering works just fine. The problem is that no one tells people this and as we have seen from the popularity of Siri and other tech that people just automatically start yelling commands like they're using a computer from a 1950s sci-fi movie.

Even in places with loud background noise, its a non-issue considering everything nowadays has two mics for noise reduction. I'm very, very surprised at how well Google voice-to-speech works. When it fails its almost always because I have a poor signal from t-mobile or am saying something that's just too difficult for machines to parse correctly.