The RoomGPT tool uses AI to generate different themes for a room based on a picture taken by the user. It allows for virtual room remodeling and has been praised by over 1 million users. The tool eliminates the need for interior design and has received positive feedback from tech experts and startup founders alike. RoomGPT can help users get indecisive about their home decor decisions. The tool is available for download and use through GitHub and Vercel.