1 And I think the question zooms out to ask 'Why would anyone want to have their house connected to the internet for remote locking/control purposes?' 

2 Well, for the house, I imagine it would be useful for monitoring the smart house functionality.  If you realize you forgot to turn down the thermostat after leaving for a trip, you can do so from any connected computer.  If a relative needs to get in while your away, they call you, you log in, click "open door", etc.

My two responses:

1.  While smart houses are a nice idea, nothing remote access can get you is worth exposing your house controls to the greater internet.  Maybe after someone comes up with a way to ( relatively ) hack proof them.  Otherwise, its bait for thieves and vandals.

2.  Why the hell would you need a smart fridge, anyway?  What possible useful feature would this provide?

3 One of my co-workers uses his smart thermostat to override the energy-consumption decisions his wife and kids make when he's not  home.

-j

4 Obviously the internet connection is so you can make instant blog posts when you have one of your "refrigerator moments" about an anime you just watched...

5 Beat me by 15 minutes that that one!