What would happen to other players creatures upon death?
According to the Comprehensive Rules (http://media.wizards.com/2017/downloads/MagicCompRules_20170119.txt), this is what happens when a player loses the game:


  104.5. If a player loses the game, he or she leaves the game. [...]
  
  800.4a When a player leaves the game, all objects (see rule 109) owned by that player leave the game and any effects which give that player control of any objects or players end. [...]


The definition of the word "die" is:


  A creature “dies” if it is put into a graveyard from the battlefield.


Since a losing player's creatures leave the game instead of being put into a graveyard, those creatures are not considered to have died, and Kalitas does not give you any tokens.