I saw someone with a Pebble while we were catching up over drinks. An incoming call came in, and in just a glance he'd looked down at the watch & back up again

I saw someone with a Pebble while we were catching up over drinks. An incoming call came in, and in just a glance he'd looked down at the watch & back up again, determining that it wasn't a call he needed to answer. With a smartphone, he would've had to reach into his pocket or backpack, press the hangup/voicemail button, put it back in his pocket or bag and apologize for the interruption to the conversation. Of course, the ideal would be turn off the phone entirely, but I thought the Pebble was an elegant & respectful way to remain on-call with work, but also remain present with others. I can see how it would be useful to some people.