Why should anyone use EOS instead of Ethereum?

With Ethereum, you can build Dapps. Why then, would you use EOS?

Update 2018-Feb-6: read https://ethresear.ch/t/against-replacing-transaction-fees-with-deposits/940/2 and https://ethresear.ch/t/initial-explorations-on-full-pos-proposal-mechanisms/925 (for the latter, particularly from "The other important topic that needs to be covered is parametrizing...").

Ethereum 1.0 isn't very scalable, however there are developments in the pipeline such as sharding, eWASM, Casper PoS and zk-STARKs (although zk-STARKs will be a few years away, probably, as they need to be optimized), that will improve its scalability while maintaining or improving security and decentralization. EOS has DPOS, which is too centralized, less secure and transaction amounts are proportional to how much EOS one holds. These trade-offs are not worth better scalability. Ethereum's approach to improving scalability while not making sacrifices is better.

Further reading: https://github.com/ethereum/wiki/wiki/Ethereum-introduction#rd

Granted, Ethereum has [issues](https://github.com/ethereum/wiki/wiki/Ethereum-introduction#issues), but IMO, EOS has more.