Unguided rockets are pretty much the average infantryman's slap-patch counter to armoured vehicles, I thought. Most won't really even scratch an MBT of course (heck, apparently the Finnish army standard APC is virtually immune to most light rockets) but that's beside the point. The things are supposed to be portable after all.
However, all of what you said only really applies in an asymmetrical-warfare scenario. 'Course, for the time being those are the only even remotely likely ones (major powers having learned decades ago that Thou Shalt Not Fight Thine Peers), but that's not the point is it ?
Plus, once this stuff starts getting more refined, common and affordable it'll eventually turn up in the poorer armies too. At that point at the latest the emission signature is going to become a bit of a worry...
