These will have limited use in a wide scale warfare as some are suggesting and can not be truly deployed in harsh terrains (like the Paf/Aghan border for eg).
I think these systems will really earn their keep when having to clear buildings, caves, hideouts etc where insurgents are dug in and any assault would lead to a lot of casualties. We all know what happened when the military had to clear the terrorists from Lal Masjid. Lot of soldiers laid down their lives in that operation, which have we had these robots (even if rudamentary), could have saved a lot of lives.