Startup Idea : Real-time collaboration site for graphic deisgners

Nowadays there is a big amount of remote collaboration or outsourcing in graphic design tasks. One of the main problems here is communication between designers and customers. Especially when there is already created some design draft and designer awaits for clear feedback. To make it easy as possible this project will give possibilities to customer and designer see marks. changes directly on graphic project in real time. Further more it would not require nothing more then internet connection and web browser and/or mobile app. Globally it should be tool for as for freelancers and as for design companies to speed up and improve productivity and communication with customers.