NotPetya Cyberwarfare ?

It is interesting that many are regarding this latest NotPetya attack as Cyberwarfare and not Ransomware.
The main reasons for this assumption are as follows:

Due to the nature of the infection, it would appear that Ransomware is being used to mask the true nature of the attack.
The files seem to be unrecoverable.
Similar to wiping a hard disk, the entire drive is rendered unuseable by overwriting the Master File Table.

It would definitely appear that the intention is to destroy rather than hold to Ransom.