With all due respect, even the smaller, remaining nukes are WMDs, and should they ever be used (which I dearly hope will never happen) anything, whether military or civilian, within radius "x" will be obliterated indescriminately. Nukes are not surgical instruments. So the 'big one' is dismantled. The ICBMs with MIRV warheads remain...same, same...IMO. (And 100% reliable missile interception - not the only way to deploy a nuke, mind you - is still a ways off.) Peace, nik. ;-)
No, it's not a ways off, actually.