I like this explanation very much. Alberto Ferrari is really good at describing complex topics in an entertaining way. I see a lot of potential in this feature and not just for large enterprises.
I like the idea of keeping the data in the cloud and only enriching it with new data and measures. And the new concept of chaining datatasets is also very exciting.
And this is probably the first time I’ve heard anyone talk about DirectQuery without making a disgusted face.
New composite models in Power BI: A milestone in Business Intelligence – SQLBI
ERP and BI 