How did Henry viii benefit from his break from the roman church?

Well, it depends on how you want to look at it. He gained power in his own country and liberated himself from the spiritual influence of the Pope in Rome. Along with that power, he got the freedom to remarry thus securing his line with the ability to pursue having a male child. He also gain fiscally with the acquisition of the lands and wealth of the monasteries.

So he secured his divine right as King, made some money, and took all control of his romantic/reproductive life.