I would like to design an iphone/ ipad application that allows you to be able to take a photo of a room, wipe the picture clean of all colour, furniture, appliances etc and re-design the room to something new that the person wants. Add some different furniture, artwork, appliances, different paint colours on the wall/s, whilst you are designing the room and adding things to it, instead of adding real images of the things you are putting in the design, use a pencil to sketch out how looks. It allows you to move things around in the room to see how it could look if you were to change it. Allows you to find trades people/builders that can help create this design that you want. If the person does like what they have designed they can save the image to their iphone/ipad or send via email to them self or a builder that can do the job
This app will cost $0.99 on iTunes if accepted by iTunes/apple