Well take this with a grain of salt, but some have said that the yields for Navi won't be great so they will have to make a cutdown card out of necessity until they can improve them.
Will just have to wait and see i suppose.
I mean you still have to aim, and the cone of effect isn't gigantic. I've gotten headshots at close range with the pump that did 36 damage.
A P102 as a PhysX card might be overkill, and now my brain's hurting trying to remember what that company was called. It was mostly rubbish, and was generally just used in motherboards to offer extra PCIe lanes.
DX12's multi GPU mode might work though.
The game had those. They had some mechanics but in the end it often comes down to everybody shoot down the bosses health bar and you can do that only so much before you get bored out of your mind.
You're probably thinking about Overwatch
I'm guessing they'll carry on licensing the necessary technology from AMD. I might be remembering wrong, but when the tech licensing deal with Nvidia ran out last year I thought they moved over to AMD. I doubt they'll need any extra licensing over and above what they already have in place for their current GPUs.