I think Ethereum might be the closest thing we have to that today. However, still things require an additional layer to get it to work in the physical world.

I think Ethereum might be the closest thing we have to that today. However, still things require an additional layer to get it to work in the physical world. Lets not forget that this technology only became 'accepted' by the mainstream in 2017. Before that, it was nerds volunteering to program various infrastructure. Also, between accounting, finance, and taxes, implementing cryptocurrency for any fortune 500 company will add additional layers of complexity.