In May 2015 the Supreme Court granted permission to appeal against the Court of Appeal's decision.
Leave to appeal was sought after the Court of Appeal ruled against the challenge to lawfulness of family migration rules. The Court ruled in July 2014 that the Secretary of State’s rules, though discriminatory in their effect, had a legitimate objective and were for this reason not unlawful. You can read more about the decision here and here.
The date for the Supreme Court hearing is still unknown. In the mean time, the £18,600 minimum income requirement remains in force.