The new Stages Gen2 power meters are available. The electronics didn't change much, the effort was put into the redesign of the housing, which now has a lower profile.
Since the first generation of the Stages power meter was prone to water damaging the electronics and draining the battery quickly, Stages focused on designing a housing that is much more sturdy and completely water-proof.
Team Sky tested the Gen2 power meters successfully at the Tour de France.