Co-founder and Chief Technology Officer Larry Ellison describes Oracle (NYSE: ORCL) as a cloud leader to be reckoned with, and he may be right — eventually. But today it’s Microsoft (NASDAQ: MSFT) at the top of the cloud heap. But Oracle’s late start — thanks to Ellison’s early dismissal of cloud computing as nothing more than “the latest fashion” — could work in investors’ favor because it translates to tremendous upside from here.