50 years from now ?
Who knows, may be the globalization will be so advanced by then that nationality or citizenship or even statehood does not matter anymore.

50 years from now, may be the whole GCC countries (plus Iran, Iraq and Yemen) decided to merge into one economy like the EU or even one country. Look at 50 years ago, how many countries had formed, merged and split since.

50 Years from now, may be India along with its South Asian neighbors are the global powerhouse economy, so majority of current expats will go home on their own free will.

50 years from now, may be the earth had been destroyed by an accidental or intentional nuclear war or the worse scenario of global warming really occur.... who can tell...

Cheers
SK