What is the fine-grained topic of the following text: People's daily lives are made more convenient with the growing popularity of smart voice assistants Apple's Siri and Amazon's Alexa, the incorporation of chatbots to service industries and social media, the combination of smart streets with weather forecast, air quality monitoring and image surveillance systems, and the increasing use of interactive digital signage boards to support market research and analysis, as well as the application of smart air conditioning and smart door security systems. Only return the topic.
The application and impact of smart technology in daily life.