There's not really a lot for Nvidia to get 'right' other then Tomb Raider (GNC regresses in this game as well) performance doesn't tank when going to DX12 from DX11 or from Vulkan to OpenGL. To put it another way Nvidia isn't faced with a problem like AMD does when a game comes out with Gameworks and cripples performance.
The only issue I see is if what Pascal cards Nvidia chooses to write Async software paths for, you have 3 cards with three different memory setups I'm not sure if Nvidia will want to invest the resources to program every DX12 game driver for all the Pascal cards.
Post Pascal I wonder if their next generation will feature a hardware Async engine like AMD cards have.
DX12 performance it Tomb Raider for me was very poor and not sure what NVIDIA or devs will need to do regarding memory and something I need to swat up on.