Lockitron
Phone to unlock front door
Unlock your door with your phone!
Places where you can get the Lockitron: Best Buy, Radio Shack, Walmart.
Improvements
Make a little hidden face reconition. If the camera doesnt reconize the person at the door, it will give you a notification and then you can see what the camera sees through your smartphone or tablet.
Original inventor: Cameron Robertson
This I think will decrease the amount of robberies.