@Oscar Although the Indian nuclear posture (or at least the particulars of it) is bound to change even within the scope of the NFU in this decade and the next. With the introduction of canisterized missiles where the warhead and the physics package are already mated with the delivery vehicle by the end of this decade and a credible sea based deterrent through the Arihant follow on submarines in the next our ability to strike with little or no warning will get a boost in the arm, I believe that canisterization is the direction in which Pakistan will move too, yes? Got any thoughts on that?
The Nasr is already in a canistered form.. and further attempts on the Babur missile are underway. The issue is the benefit of canistered missiles other than those at sea. Having the warhead mated with the missile does not essentially imply a canister. The Canister's greatest advantage is its ability to be replaced for reuse faster, and is relatively a cheaper investment... other than that.
Cold launch techniques also do not imply a cannister.
Basically, to canister a missile is for it to be able to come straight out of that canister, and be on its merry way. Whatever its purpose. In that regard, the Nasr is in a canister.