"Under the current system, high-income Canadians can benefit from a more favourable taxation rate for income derived by stocks and real-estate investments when the investment is held in a private corporation. The proposed measure would not be applied retroactively, but rather to future investments."

Did anyone who watched live have any sense of what this means?  Was he alluding to actual taxation rates or rather  more broadly attacking the ability for the corporation to be a tool to DEFER a portion of tax? The later position seemed to be highlighted by CBC whereas G&M article is not clear at all.