Being designated a “dongle” certainly means it will simply plug into a Smart TV set-top box or computer and provide Google TV connectivity. It will be controlled by O!Mobile Control Center, which was developed by ASUS and available for Android devices running Android 2.1 or higher. The control is handled via 2.4GHz Wi-Fi.
Outside of the copious amount of information in the FCC documents, what we do not know is when this will be available, and how it will be available, either as a stand-alone or as part of an equipment or accessory bundle.
sources: FCC via Android Central and Engadget, O!Mobile Control Center app