I would like a driveway alarm that works just like the Dakota and Mighty Mule driveway alarms with a magnetic sensor. The base station would connect to Wifi ( Not the distant sensor ) - Thus enabling more distance.
With magnetic sensor would not get false positives from motion.
This would give us more of a heads up that someone is coming into our home zone and allow us to watch our cameras.
[Mod Edit]: Added links to referenced products.