I believe ETH will surpass bitcoin because their technology is already better than the technology of bitcoin and i believe it can even go better than that and i even think bitcoin will go down eventually and ETH will be on the top forever.
I agree about eth having a better technology and features than btc but demand is with bitcoin's side. Perhaps if people will be more aware of eth then it can pose a challenge. As it stands, people who are new to crypto only recognizes btc