Eos will surpass Ethereum market cap simply because it is a much better blockchain. Eos does not have the acute scaling problem the crypto kitties exposed! Cryoto kitties are a case point for dapps but not for ETH.

According to Ethereum themselves it will take years to solve Ethereums capacity problem. Their sharding sollution is mediocre at best, complicted, inefficient.

Eos can trade hundreds of thousands of transactions per second at zero fee. The right to use the network comes from holding Eos coin, but you don't have to spend any.

Eos has an experienced well funded team. It is easier to build Dapps on Eos. Individual Dapps can be fixed or blocked by the developer. Eos is built as an operating system for Dapps. Rust programming language supports concurrent algorithms.

Eos will not have its own blockchain before June 2018. Many are cautious untill then. Superior tech will guarantee wide adiption, which cannot be said about head start Ethereum.

If Ethereum trades sideways at €1000 per coin the same market cap for Eos indicates €100 per coin.