I wish I could tell you the recipe for figuring out who the target user is for your product and who your users should be, but... there isn't a recipe. It comes down to think really hard and use your judgement to figure out who you're really building this for.
Emmett ShearThe question is, once you have this idea, is this enough? Is it something people would actually switch just to have?
Emmett ShearSales is this cure all for this problem. Get people to give you their credit card and I guarantee you they're actually interested.
Emmett Shear