Basically the Token Taxonomy Framework (TTF) pursues having a standardized classification of all digital tokens that could be issued or transferred by any digital ledger. What it means is that a blockchain could be seen just as a network of nodes capable of minting and transfering TTF tokens. TTF tokens could also be easily transferred between different TTF compliant blockchains or banks. There wouldn’t be any need for on-chain turing complete smart contracts for the TTF tokens capabilities to work.
Please don’t see this as a feature for Nimiq planned for the future, since I’m not part of the Nimiq team nor talking on behalf of the team either.