[arielb]

well the warhead of a cruise missile isn't very powerful and it can't hover around waiting for targets

[A.A. Cunningham]

Guess again. Standard warhead for a TLAM is 1000 lbs of HE. They can also be armed with a 200 KT nuke.

[DefCon]

I guess there must be a way to determine or calculate the gps of a distant target from an obvservation post and transmit those coordinates to the drone loitering high above. Using gps makes weather/cloud cover irrelevant and at 35,000 feet, nobody even knows the thing its up there.
(at least in 'todays' war ... different story if the enemy has an airforce or sams)

But anyhow, like tanknetter and saxxa say, the X45 is there to test the technology and is likely nothing like the plane that will ultimately be deployed. This program is early in development.