What about user interface and user experience? That's a key area that all the successful companies you've listed do very well, and something that decentralized

What about user interface and user experience? That's a key area that all the successful companies you've listed do very well, and something that decentralized approaches traditionally don't do well. The typical user doesn't care how it works under the hood--they just want their room/driver/goods and services quickly and with a minimum of fuss. Being good at this will remain difficult and expensive even in a world where Ethereum dominates. Perhaps it competes better on the infrastructural level, against the likes of credit card companies, banks, and cloud services than against polished b2c applications?