Products already exists. That's what users consume. That's also why users don't care about technological developments unless those technological developments improve user's experience, not make it more difficult for the users.

How does it "reduce costs" if you still have to support both?

And I can't find how much licensing actual costs for H.264.

If there is a demand, content will come, I doubt the difference in cost made by the licensing fees are going to mske a difference.

No, but potential for bandwidth caps with fees for going in light of the removal of network neutrality legislation might tip the balance in the favor of the codec that looks better at a lower bitrate.