Spain was forever lost to Carthage and passed into the control of Rome for the next 7 centuries, though not without troubles of its own. Carthage was reduced to the status of a client state and lost all power of enacting its own treaties and diplomacy. It was forced to pay a tribute of 10,000 talents, all warships, save 10 were turned over to Rome along with any remaining war elephants. Carthage was also forbidden to raise an army without the permission of Rome. Grain and reparations for lost supplies also had to be provided to Rome as well as having the resposibilty of collecting runaway slaves and returning them.
Masinissa, meanwhile, as a reward for his service to Rome, was crowned King of greater Numidia, and allowed nearly free reign in his territory. He, of course, took full advantage of Carthaginian weakness and captured much territory from the city in the afermath of its defeat (probably encourage from Rome.)
Hannibal remained a constant source of fear for Rome. Despite the treaty enacted in 201 BC, Hannibal was allowed to remain free in Carthage. By 196 BC he was made a Shophet, or chief magistrate of the Carthaginian Senate. In a short time he reformed many corrupt policies within the government of Carthage and tried to strengthen its internal political system. In-fighting, however, forced Hannibal to flee to the east where he later joined up with Antiochus III of Syria to fight the Romans once more.
Scipio Africanus was at first proclaimed as a great hero, which he was. Rome had lost over 300,000 men over the course of the war, farms and other establishments in Italy were devestated. Without the leadership of Scipio in Spain, Rome may very well not had the resources to continue the fight, or Hannibal would've been reinforced making Carthaginian victory far more likely. Scipio would later serve in the east during the Macedonian Wars and against Antiochus, but would be victimized later in life by the brilliant politics of Cato the Censor.
With its victory over Carthage, and over the Macedonians in a series of wars, Rome became the master of not only all of Italy, but Africa, Spain and Greece as well. The defeat of Carthage transformed the Roman Republic from a growing regional power into the super-powered Empire of the Mediterranean.