So after ethereum prove it self to be the most successfull alt coin, you still asking this question ? Ethereum is the best alt coin for now. With it smart contract people using it for ico and the project 9n top of its blockchain most of them is success..ethereum has changed crypto world..
Is it success ? Yes...it is !!!
yes i agree ethereum has changed the crypto world,
because now a lot of ico and projects that produce coin associated with ethereum
There are many ICO projects do not mean Ethereum has changed the cryptocurrency world. It just helps changed some parts in the ecosystem of cryptocurrency, of course, I cannot negate that. But Bitcoin is main reason make the investors know the crypto world.

Bitcoin is and will always be the grandfather of all crypto, meanwhile Ethereum is the rich uncle that's using money to add new rooms in the crypto-house.
Take a look at opakeco.org for example, they are bringing charity to the crypto-ecosystem. Without Ethereum this wasn't possible