Mainly because you feel like an utter prat walking down the street talking to your wrist. Had an original G Watch and truly felt like the biggest ck saying "Ok Google, remind me to do XYZ".

It had 3 uses: 1) seeing who's ringing and dismissing calls in meetings where you left the ringtone on 2) being able to read full message threads through the notifications without having to "read" them in the apps (sneaky for Messenger and Hangouts) 3) pretending you're not a tourist by getting navigation directions on the wrist rather than being obvious and looking at your phone.

Suffice to say, I now wear a nice normal watch that I love dearly.