Frankly, it would be kinda lame if the future governments were just slightly better versions of previous governments. In terms of the number of policy cards, your description is accurate though but hopefully, they will get unique bonuses that will make them different and interesting. Conceptually, these future governments are rather thought provoking and deserve good gameplay abilities. Also, I hope the abilities are better than just +/- points. For example, I would find it kinda boring if Digital Democracy just gave you +2 amenities per city.