These new Korean only KT landline phones, released under the brand "Ann", do two notable things. One is sending an SMS to your mobile phone when you've missed a call on your home line. The second is recording audio if someone enters your home when you're away, giving you evidence that you can eventually turn over to the police.
The SMS notifications are pretty cool, but we don't know how much use the proximity recording is going to be. Maybe burglars are going to list all the items they steal out loud?
KT releases new phones in Korea [Akihabara News]