The way the world is moving towards drones and UAVs which are much smaller versions of traditional flying aircraft yet they are potent in a new way, I expect such an evolution is due in the domain of missiles... and Fatah-1 is just on point; a small, inexpensive and precise rocket that you can launch in scores.
Now you can launch a surprise attack on your enemy and destroy their airports, ammunition depots, grid-stations, fuel-storage locations and mechanised caravans while they were 100s kilometres deep inside the border without giving missile defence systems a chance.
I've tried to calculate the speed of the rocket (in a crude way) and looks like it is between Mach 3-5. Is that a fair estimation?