those three dots are for accessories that get treated like they are not accessories, like internal devices.
also, he is releasing a gadget called Home, which is a hub for IoT that will tie into the phone, and your toaster nicely
here he is talking to wired:
" Over dinner and wine, he and his wife, Rie, discussed his next move. “How do I top Android?” Rubin asked. “What could I possibly do that would be bigger than that?” “Don’t do one thing,” Rie replied. “Do 10.” And so Rubin launched Playground, a venture capital firm where a few dozen engineers and designers at Playground Studios help startups build stuff."