Easy shortcut to launch video hangout to contact and auto-answer
Initiate video chat with "mom" and auto-answer so she doesn't have to fumble with Hangouts.
Keep phone/tablet in kids room and easily call to monitor.
Give to dumb babysitter and say "press this".
Many apps to do this for phone (and some on skype)
Lots of trouble trying to find correct intercepts but I know they are there (I'm a developer-light)
Tasker integration ++ of course.
Add other video chat apps (skype, viber, jitsi, sip, etc.)
Add for "Group" hangouts to quickly setup
I can help collaborate / design / test.