Richthofen
Newcomer
Nope not really as proven with the GTX460 and 470. All Nvidia will care about is to regain market share. They are in a very good position to do so. So if the GTX560 does perform where everybody is expecting it at the moment you will se a wide variety of cards directly battling with Barts based products.It's certainly going to affect the price they can afford to sell it for.
DIE size definatly is not the thing they will bother much around with at the moment. They want to regain lost ground and financially they are in a much better position than AMD as the last quater has already shown.