Mark my words, Hashim Amla will average 65+ in ODIs and 70+ in Tests at the end of his career.
Virat Kohli will remain in the lower 50s in terms of average. That being said, he has a poor average of 33 in Tests. So, Amla by a fair distance!
"And be true to every promise- for, verily you will be called to account for every promise which you have made." - [Al Qur'an - 17:34]