Well Kaliyug is the last phase. after kaliyug they say kalinki will come and destroy this whole maya and the world will begin again. Kaliyug is the age of evil. And in the vedas it says that vishnu's last avitar will come In a mechanical horse etc. See the vedas have already written things that no one can even imagaine that would happen now. It goes into details saying he will be in a Mechinaical made horse. THAT SOUNDS LIKE THE FUTURE.