Within 5 years India will overtake China as the world’s most populated country, and Africa is expected to reach 4 billion by the end of the century. China’s moment is now, not 50 years from now.
Not as many stories about people jumping out of factory windows to end their lives in Africa. There are many hidden gems in Africa as well with perfect climates and cultures that have little to no thievery or need for distrust. These things aren't well-known or stereotypical because Africa is dismissed outright so quickly by so many without further investigation, but it's true anyway.
In 50 years, I think this will remain true and Africa becomes even more desirable yet than China. If you want to work, or want your less fortunate children to work at Foxconn pumping out iPhones with management practices that westerners cannot even imagine at this point in their history, China may be an option if they'd even welcome you. Of course everyone assumes they'll be the boss at the desk browsing HN or scrolling through Facebook during the workday instead, generally enjoying the good life.
Africa. This isn't even a contest.