Do I get the basic right?:
Israel's state-owned Rafael Advanced Defense Systems Ltd and U.S. firm Raytheon Co. are developping a "multi-tier missile shield" under the guidance of David "Magic Wand" Sling.
Iron Dome is the lowest tier.
The top-most tier is Israel's Arrow ballistic interceptor.
Is this an Arrow anti-ballistic missile interceptor?
OK, -WHAT AM I MISSING?
The current system intercepts an enemy missile with a very expensive one use missile.
When the directed energy devices are perfected you could replace the intercept missiles with an energy device and the cost/intercepted missile would plummet.
Last thing I read was they were testing such devices in US Air Force planes so this capability doesn't seem to be that far fetched.