The experts discuss the future of point-of-sale (POS) and e-commerce systems for retailers. They agree that retailers should work towards an "omni-channel platform" that provides a single view of inventory, orders, and customers across all sales channels. This platform would replace separate POS and e-commerce systems. In the short-term, retailers can use a middleware layer to integrate different systems, but ultimately there should be one platform handling all transactions. Mobile POS should be an extension of the main POS system to provide a consistent experience. POS in the cloud offers lower costs and flexibility for retailers of any size.