Ethereum helped by introducing many ICOs to the Crypto world. It has a very popular blockchain that most ICOs are using now to develop their ideas and concepts. From that perspective they have changed the crypto world.
Ethereum is one of the most used blockchain technology in crypto world recent London research stated Ethereum is more decentrelized than bitcoin that mean holding ehereum by organization or any entity less comapre to bitcoin. Also once POS concept implemented ethereum will reach next mile stone.