Startup Idea : P.O.S. It

The idea is fairly simple, a Point of Sale system that does more than just Point of Sale tasks. I want to create a system that allows a business to work off one system for all their primary needs. This includes time clock and scheduling, Point of sale, inventory management, procurement and I think some API calls would be awesome for cross-checking competitor pricing. As well as looking at services such as Amazon to check if the business is buying their product at the lowest price available. Obviously this can spiral into a large group of external services such as Paypal and things. This system will have to have multiple modes it can run in, either for a retail environment or for a restaurant environment. With the restaurant environment I would like to see an automated ordering system of some kind so that customers can order from their mobile device or a small device provided at the table. One of the main requirements for the end system is to be able to run the client software (the actual POS It interface) on a small form factor device such as a Raspberry pi. There are many more ideas I have for a final product, but this is a good start! Hope you like the idea!