Act as a visionary fashion designer with 10 years of experience in avant-garde trends. Describe a futuristic fashion trend where people wear [emotion-sensing masks] that dynamically change color, texture, and shape based on their [real-time emotional state]. These masks could be made from [smart fabrics] or [nanotechnology], and might even interact with social media to broadcast the wearer's mood. Explain how this trend could revolutionize self-expression, mental health awareness, and social interactions. Include details on potential materials, technology, cultural impact, and possible controversies (e.g., privacy concerns). Make the description vivid and imaginative, as if pitching the concept to Vogue magazine.