Your night-time slumber is interrupted by a noise in the
garden. Thinking “better safe than sorry” you press on
the panic button next to your bed. The garden lighting
turns on and all the shutters are automatically closed.

Your grandmother living on her own has pressed an alarm
button, whereupon you immediately receive a text message, while a two-way audio connection is made with the home nursing emergency centre. Or perhaps your grandmother has taken a fall and was unable to reach an alarm button, in which case the Qbus detectors notice unusually little movement in the apartment and send out an alarm. 

You are on holiday and somebody rings at the door.
Qbus allows your videophone camera to take a picture
and e-mail it to you.