I had almost of same question but later after watching few videos, I understood that it will not be the ether killing coin. Even Gavin too said that Polkadot isn’t going to replace Ethereum. It's kind of sideway for ETH.
Exactly, each project will have a different view about the new platform, ETH and Polkadot are completely different blockchain, even after watching many videos, we can understand each blockchain has a different view based on the development it will get high exposure in the market. Polkadot is getting awareness about its platform, which many new projects are implemented in the Polkadot blockchain.