So if you are physiotherapist for example, you may not want to just provide a product on physiotherapy broadly, but pick a particular area or niche market within physiotherapy to focus on - possibly" physiotherapy for back pain or back pain sufferers". Once you have your music stored in digital form, there are lots of new options for playing it back that can surpass the earphone experience. That good ole fashioned stereo is step 1, but now the fun begins. Imagine having all of your music avai...