Say I have an on-prem tabular server. It will be used to serve excel reports (hosted on sharepoint) and dashboards in power bi. All from a single model, that's hot!
Question: what exactly will my experience be in Power BI?
By default, I am sorta assuming I will have a live connection (do I still call that DirectQuery?) -- and I will not be adding any new measures (etc) in Power BI. It's just... a report builder.
But I get the feeling I can also... do some freaky import into Power BI... still re-use my existing measures (from tabular) and add new measures in Power BI? Is that... good or bad? 
(Would go try it, but the Tabular server isn't up yet... suppose I could try out the new Azure SSAS!)
Thanks for infos!