Reuters has an excellent article for Yahoo News on the likely developments in post-Chavez Latin America. Generally, its author - Terry Wade - predicts less radicalism, less anti-Americanism, and more capitalism.
Wade believes that leftist feelings remain but there is no leader in the region with Chavez' charisma to give the movement fire. Probably the main beneficiary of the post-Chavez era will be Brazil, which tries to combine social welfare spending with capital investment and growth.