These are the key points:
Anyone arriving on a tourist visa can apply to extend for a total of 120 days. it must be done within your 30 day tourist visa or the 60 days if you have an extension. They are working on the website but its not yet ready. (so it doesnt say how to extend or cost)
Changes to the sanciones (overstay fines I assume) based on the visa you used to enter the country and what you are actually doing. Arriving on a tourist visa, extending 120 days and doing business here may not be acceptable for example.
It is illegal now to overstay past that 120 days. And they can refuse you re entry. They retain the right to establish what will be "acceptable".
I am assuming (big assumption) there will be a transition period and people need to get informed and make your choices accordingly.