EOS and ETH, Bitcoin are different and is run buy different individual , development of technology will try to reduce the existing one value but because there is room for constant update both EOS and ETH will stand on there own and perform better on the kind of service they deliver. So therefore EOS and IOTA are just new improve technology but can not take the place of Eth and bitcoin it also give room diversification of investment because it is not good putting ones egg in one basket.