The new President was once an insider, pigging it in the same trough as the Mugabes. He has a very unsavoury reputation for being responsible for all kinds of atrocities. He only looks a saviour because he overthrew Mugabe after he ceased to be in the golden circle. There is no reason, in principle, why his Presidency should not just be more of the same.
There is also the danger that the army having interfered in politics once, with such success, may do it again, so you get an army run state with a civilian government wallpapered on the front it to hide it.
On the plus side has been the demonstrations and widely expressed hopes of Zimbaweans. If the new president or army do try the more of the same game, they could rise again.
My hope is that the open expressions of Zimbabwean's hopes for a democratic government and the demonstrations of the visceral hate of Mugabe shown over the past week will give the new government and the army pause for thought and that some level of proper democracy will ensue