Tommy Hilfiger is one of the leading brands in this field. Their fabulous showroom, in the heart of Knightsbridge, has had a tech makeover to help in the buying process. There are still samples of the pieces so you can take a closer look at the shapes and feel the fabrics but then the selection is transferred to a huge screen so you can really visualise what the whole collection will look like in store and how the colours and pieces will sit together. While technology is helping there still really is no substitute for seeing the garments for real to make sure the product matches up to the image.