There is always the new hotness. The researchers and research money needs to go somewhere. Until it reaches silicon levels of efficiency and durability it won't become a serious contender. Silicon has reached the point where it is 'good enough' to go further and further. Usually 'good enough' wins versus 'perfect but not quite ready'. We may see with great interest where the perovskites start to level out in efficiency. If they really come close to silicon and stability is solved the market might shift very quickly.

Keep a close eye to the NREL chart.

EDIT: 22.7% for Perovskits vs. 26.6% for Silicon. It's getting hotter as CIGS and CdTe are beaten: https://www.nrel.gov/pv/assets/images/efficiency-chart.png