10. A processing system comprising: a display configured to display visual content; determination logic configured to determine whether one or more entities in the visual content are selected in accordance with an explicit scoping command from a user, the explicit scoping command identifying the one or more entities in the visual content to explicitly indicate a scope of an interaction between the user and the processing system; speech understanding logic configured to understand natural language requests; activation logic configured to turn on speech understanding functionality of the speech understanding logic in response to a determination that the one or more entities are selected in accordance with the explicit scoping command; an audio interface configured to receive audio signals; and monitoring logic configured to automatically monitor the audio signals for speech requests from the user in response to the determination that the one or more entities are selected, the monitoring logic further configured to provide the speech requests to the speech understanding logic for processing.
10. A processing system comprising: a display configured to display visual content; determination logic configured to determine whether one or more entities in the visual content are selected in accordance with an explicit scoping command from a user, the explicit scoping command identifying the one or more entities in the visual content to explicitly indicate a scope of an interaction between the user and the processing system; speech understanding logic configured to understand natural language requests; activation logic configured to turn on speech understanding functionality of the speech understanding logic in response to a determination that the one or more entities are selected in accordance with the explicit scoping command; an audio interface configured to receive audio signals; and monitoring logic configured to automatically monitor the audio signals for speech requests from the user in response to the determination that the one or more entities are selected, the monitoring logic further configured to provide the speech requests to the speech understanding logic for processing. 15. The processing system of claim 10 , further comprising: intent logic configured to satisfy a specified intent with respect to the one or more entities based on receipt of a first speech request from the user, the first speech request indicating that the specified intent is to be satisfied with respect to the one or more entities, the intent logic further configured to adapt an understanding of an intent of the user based on the specified intent; wherein the speech understanding logic is configured to use the understanding of the intent of the user to understand the natural language requests.