It seems a whole lot more useful than Amazon Echo. Because Google has a more complete ecosystem and access to more of your personal data, Home is able to integrate deeper into your life. Google's intelligence when it comes to context is a big factor, and that makes interacting more intuitive. Do you want Google to have all that information about you? That's a question you'll have to ask yourself, but if you're already embedded in the Google ecosystem (using Google Calendar, Maps, YouTube, etc.) it's just one small step beyond that. If you aren't in the ecosystem, well, maybe the promise of a smart home that's actually smart will entice people to take the plunge. That's what Google is hoping anyway.