"Unannounced features" refers to new or unexpected elements of a product or service that have not been officially disclosed or publicized beforehand. Full definition
However, we have seen recently that the emergence of new unannounced features in Alexa and Google Home have been quickly followed by product announcements. (voicebot.ai)
And over the last several weeks, developers like Rambo have uncovered previously unannounced features. (tomsguide.com)
It is a fact that there are a number of unannounced features included in the firmware update apart from those that have been detailed by Sony Computer Entertainment. (segmentnext.com)