The only problem it bothers me, is that the final table should have the column names based on the slicer selections. In picture above TotalBase should display "FY_2010" and the TotalCompareTo should display "FY_2011".
I could obtain this by manually renaming the measured used in the value field, but if the user select other options in the slicer I have to rename the fields again.
As I could rename the field manually, could you consider a way to "set its name" by another measure value (ex. SelectedYear-Base)?
For the moment the only "workaround" is an card visual with the same font/size as the other colum titles from the table but loosing in this way the "focus mode" for that table, sorting etc...