I would think it could actually increase their market
, if you consider the amount of people who play Firstperson shooters opposed to people who play 3rd person.
I personally feel that its too bad that you are limiting your expierence by closing yourself off to one of the largest genres.
Yes Mount and Blade stye is fun, fresh and pretty unique. Those all good things, though unique often can also mean unpopular, afterall there are often reasons why something hasn't been done before. I think regardless of whether it is Firstperson or 3rd person this game already looks great. Perhaps it might even make some of the larger companies notice a unique path of Firstperson shooters, the Civil War and perhaps even earlier. I think its about time they stop creating the same Modernwarfare/World at War crap thats gets shoved into everyones faces annually.
So I say if you don't like the concept of Firstperson, and are unwilling to give War of Rights a chance, thats fine. Perhaps you should go and watch Battle cry of Freedom instead.