The idea of smart contracts or world computer is flawed. A better term would be a scripted financial transaction. They can be done in a trusted environment, but there are a lot of benefits of having a public cryptography secured ledger.

Though the article author omits it, EOS mainnet runs on LLVM and WASM contracts and executes about 1000tx/s today.

A more powerful financial VM is needed e.g. for on-chain order books.

More about use cases vs. databases can be found in my article

https://tokenmarket.net/news/opinion/capital-markets-upcomin...

"This idea doesn't seem relevant in my tiny corner of software development, therefore it is not relevant in ANY of software development" is the disease of this website.