There's a significant risk it will lead to a large reduction in living standards. A lot of things like retirement funds are built with the assumption of infinite growth. This assumption will obviously break one day and when it does I don't see how it could go smoothly.
On the plus side, it will likely lead to lower emissions, assuming it doesn't lead to massive wars or other destructive behaviors due to the instability it will bring.
> retirement funds are built with the assumption of infinite growth
Of workers. Because retirement funds take money from workers to pay for retirees.
Assets and productivity, on the other hand, can grow a lot more than the population. Right now it's considered communism to tax assets. Once we get over that taboo things'll go a lot smoother.