No, that is just one example of a payload - the token itself is non-fungible, so presumably some one could write code to associate the ownership of that token to some game feature. Lets say a mount in WoW, then you could trade said token as part of a secondary market.

I dont think its a great idea, largely because making the ledger operate in a zero trust environment isnt a great value add for video game tokens, but it's important to judge things on their merits and in this case you could build a system as described.