1. One of the most useful future technologies could be advanced artificial intelligence (AI) integrated with natural language processing and machine learning. This could lead to more sophisticated personal assistants that can understand and respond to human emotions, preferences, and even assist in decision-making processes across various fields, including healthcare, education, and personal productivity.

2. Yes, many of these technologies are already in development or partially implemented. For example, AI-powered virtual assistants like Siri, Google Assistant, and Alexa utilize natural language processing to comprehend and respond to user queries. Additionally, many healthcare systems are beginning to use AI algorithms for diagnostics and personalized treatment recommendations, demonstrating the practical application of AI in real-world scenarios.