I think there are clear benefits to putting in policy now rather than waiting. The longer you wait, the more expensive it's going to be to drive these changes.
As to the specifics of exactly where the market is going, the great advantage to carbon pricing is that you don't need to know for sure. You can get the market right, set the prices right, and let the market respond, let businesses identify where they see opportunities. Businesses choose where they want to develop new technologies and new processes that reduce more emissions at lower cost. That's how carbon pricing works.