SwitchBot, a provider of AI-enabled embodied home robotics systems, announced Curtain Track 4 on November 11, 2026, making the retrofit motor for compatible U-rail curtains available through its store and Amazon from $109.99, with a Battery+ version rated for up to 12 months per charge. Other listed starting prices are C$139.99, £99.99 and €99.99. The retrofit approach preserves compatible curtains and tracks already installed, putting installation and maintenance at the center of the upgrade…