If you, like a lot of the startups outthere , are going ot make another better shopping, better video sharing, or better... whatever service/product then by all means, do that. But I bet you nobody who ever did anything original did that first. Because by definition if you want to come up with something new and different, people will invariably say No until they can actually touch it and feel it. After that they may or may not say yes, but definitely not before.