Relative ease? Averaging 50+ over 27 innings is pretty tough to do. Over the last 2 years, of all batsman to have batted at least 27 times, only 9 have averaged over 50. It would be a little fool hardy to overlook Kohli's average over his last 27 games. Those numbers are incredibly meaningful. The runs he scored over his last 27 innings are far more meaningful (and predictive) than the runs he scored in his first 27 innings of his career. As with weighted averages, current data points are more relevant than data points in the distant past
As to projecting Kohli to score 4 unbeaten hundreds, for his career, Kohli has just 8 unbeaten centuries in 153 innings. Expecting him to score 4 unbeaten centuries in 27 innings is
really, really, really unlikely. Over his last 27 innings, Kohli has scored 3 centuries, of which only one was unbeaten. He has just 3 other scores of 50+.
To put this into context as to how unlikely it is that Kohli scores 4 unbeaten centuries in his next 27 innings, over the last 3 years, Kohli (71 matches) and de Villiers (62 matches) have scored 3 unbeaten centuries each.
Kohli's last 27 innings sorted from high to low can be seen below.
(Graphic can be enlarged by clicking on it)