RSK offers a much better smart contract solution than Vitaliks version and they will eat a lot of market share from ETH.
ETH will never be number 1, nothing can compete with Bitcoins Blockchain.
Agreed, when the years pass providing path for more and more altcoins to rule the cryptocurrency network surely the competence in the development as well the other features will be increasing. The same won't cause a big change causing the ETH to rule the cryptocurrency network. Always bitcoin will be the one and only digital currency that stay number one and altcoins serve further.