Yeah, definitely going to see tariffs disfavor rooftop solar (utilities don't want to be the "battery" if they can avoid it), which is going to increase battery uptake rate (to consume your own generation first instead of export it for no value to the grid), which will drive battery prices down faster.
For people with rooftop solar and no batteries, that's already the case (depending on the feed-in tariff of course).
Saw an article about this today: https://www.abc.net.au/news/2019-12-05/solar-panels-rebates-...