Brewing utility actions, macro economic events, coupled with the end of a subsidy regime mean the current lease/PPA business model pioneered by SolarCity is coming to an end.
We can say with conviction that the resi solar industry will see a major reset by the end of 2017 (i.e. within a year after ITC expirations). Most of the resi companies, including SolarCity, may not survive in their current forms.
A though provoking article for solar investors:
SolarCity Pioneered Residential Lease/PPA Business Model Is About To Become Extinct