At its I/O conference, Google unveiled its new Brillo operating system; a stripped down version of Android aimed at devices that don’t need the full Android stack or are too hardware constrained to run full-fat Android. Alongside the new Weave API framework, intended to standardize communication between devices, it seemed that Nest’s portfolio of smart home devices would be a flagship launchpad for the new software. But this week, Nest simply unveiled a rebranded Dropcam, called the Nest Cam, with no mention of either Brillo or Weave, and definitely no mention of the soon-to-be-released 802.15.4-based Thread protocol that could presumably link the ecosystem together. While we thought the Thread launch might coincide with Nest’s press conference, it turns out that…