An end to trying to invent new markets for shit people don't want or need. Also an end to making 3+ different tiers of commodity. No more planned obsolescence, built-in defects to get people to buy replacements, or otherwise making what should be durable goods disposable.
The elimination of finance, insurance, marketing, rentierism, and other such vampiric market sectors. Obviously, the absence of capitalism and the profit motive would do away with these things, anyway.
Depopulating and rewilding the suburbs will be important for preventing complete biosphere collapse.