Well the tax payer, would be paying the 30% subsidy for Home Battery deployments, which I understand is severeral $Billion 8.5 AU at present.
One group of loosers will be people who can not afford to participate in this program. It would seem another group would be users who cannot shift their electrity demands from peak times when electricty will become quite expensive.
I suspect after they are quite widely deployed. Government could change conditions in future that they must be available as virtual power plant (VPP)
There has been a rush on these since people want access to cheaper power and they believe to avoid the power increases to come. That there will be big increases in power , especially during peak time is the forced introduction of smart meters which allow easy tariff change etc ....