Will the Power BI Designer "Create Measure" interface be changed to be in the context of the columns

The future of creating a calc column will definitely include context.  This will play out in a couple of ways.  Give us a month or so and you'll be begin to see how it will work.

I also hope that the current tabular interface for measures will go away. Some sort of a folder/tree like structure that would allow to easily find and organize measures would be great.

Also, dealing with MTD/QTD/YTD, Var to Plan, Var to Forecast, Var to Last Year, Var %... somehow needs to be addressed so that we don’t end up having to write/organize 5-10 different variations of the same measure over and over again like we have to do today.