What are some household items that need to be improved?

Several household items could benefit from improvements, such as vacuum cleaners, which could become more efficient and quieter while using less energy. Additionally, kitchen appliances like dishwashers could enhance water and energy efficiency while optimizing cleaning performance. Smart home devices, including thermostats and lighting systems, could further integrate with renewable energy sources for better sustainability. Lastly, traditional furniture could evolve to incorporate more multifunctional designs, maximizing space and usability in smaller living environments.