There is probably a threshold effect above which the technology begins to be very useful for production (other than faking school assignments, one-off-scripts, spam, language translation, and political propaganda), but I guess we're not there yet. I'm not counting out the possibility of researchers finding a way to add long term memory or stronger reasoning abilities, which would change the game in a very disorienting way, but that would likely mean a change of architecture or a very capable hybrid tool.
the greatest step change will be when mainstream business realise they can use AI to accurately fill in PDF documents with information in any format
filling in pdf documents is effectively the job of millions of people around the world