Some have said Android Wear is put simply, a range of Google Now watches. See the sales video from Google here:
Google Now is a voice activated intelligent PA launched in 2012, similar to Siri from Apple, Alexa from Amazon and Cortana from Microsoft. Google Now is available within Android Wear smart watch devices, the Google Search mobile app for Android / iOS and the Chrome web browser from Google on personal computers. By using Google's Keyword Planner data we can see some of what people searching for using their voices on Google.
To use Google Now on a smartwatch you say “OK Google”... and then your watch is listening. Wow! Now that is really really creepy! You can use your voice with Android smartwatches to do things like search Google for information, get travel directions, and to create personal reminders. For example, you can say "Ok Google where's the nearest grocery store?" to find grocery stores near you . There are commands and queries unique to Google Now on Android Wear smartwatches e.g. “what’s my heart rate?” (which also may be a 'normal' text search query).
* Please note that the table below is ballpark, approximate data just to give an indication of what the commands people appear to be using Google Now on smartwatches (this data will contain smartphone searches as it is currently not possible just to get smart watch search data from Google and some commands are common to both phones and watches). This is not an exhaustive list of Google Now commands on smartwatches.
Based on the phrases (including those below) in my research Google Keyword Planner reported that around 67% were from mobile devices with full browsers – this may be distorted by the inclusion of the phrase “OK google” for comparison):
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