It would be nice to have a very quick and easy way to create a datasource, at one end just put in the SQL or point it to EF at the other end JSON WebAPI. 
It needs to work well with AngularJS.
It would be nice if you also have a look at BreezeJS to see have you can traverse data keys(more an Entity Framework thing). Even if consistent T4 data frameworks are created.
What this means to me is that I can web service enable existing SQL and how have to worry about security, that the endpoints can be monitored or scaled up. So I can move quickly from Proof of Concept to Hardened Product with out the usual friction.