According to Android Police, Google might be planning a big hardware related event for October 4th, where the new Pixel Phones, a 4K-Chromecast, a Daydream VR-Viewer und Google Home will be presented to the public.
http://www.notebookcheck.net/October-4th-Google-Pixel-Phones-4K-Chromecast-Daydream-VR-and-Google-Home-incoming.173269.0.html