This could be good for all if this someday comes to life, and like you said printing for fiat wont be necessary anymore we would keep green enviroment.
Yeah. It will be something convenient, and it would save a lot of costs (not to mention that digital money is environment friendly). If all the people around the world get used to cashless payments, then governments would've started rolling in digital currencies at a faster rate than what it is right now. All that is needed is the proper education, to introduce as much people as possible into cashless payment methods such as cryptocurrencies, to pave the way towards a cashless society in the future.
With this system, you can store any amount of "digital money" into your device without having to carry bulky stacks of banknotes all around you. With cashless payments, you get security, convenience, and portability allowing you to travel to different places in the world and access your money easily.
I hope that with the advent of DAOs, DACs, smart contracts, and digital fiat currencies in the mainstream world, we could achieve a cashless society that would greatly improve the economy of the world.
True. The transparency of the blockchain allows any external entity to verify the authenticity of the transactions, the balances associated with an address, and more. This kind of system could prove useful for governments in establishing a cashless society as it gives them the power to track over any transaction occurred within their blockchain. It will greatly reduce criminal activity such as money laundering, as every single transaction made on the digital fiat currency's ledger would be visible and trackable by the government.
Because of this reason, I believe that a cashless society is bound to happen soon. It has already been introducing itself with the advent of cryptocurrencies, and it will slowly transform our world as it integrates itself into central banks and governments alike. Just my opinion