In some sense, a robot fighting force will be a sort of Next Generation Neutron Bomb (TM). It will have the capability to enter the population center of a non-peer opponent and sever communications and secure key locations for immediate occupation by friendly force hoominz - but entirely without the muss & fuss of kinetic destruction or the toll in souls of massed gunfire.

Of course this kind of scenario was the fantasy outcome of the lightning win over and occupation of Iraq, with "thunder runs" and such, but in the longer term it didn't work out that way.