Based on my preliminary, incomplete understanding of D3D12.
I think there's chance the market will have to split, with non-performance critical apps staying D3D11 and therefore being not "up to snuff". Fortunately this isn't likely a problem for them.
I have personally been in love with
display command lists since they were released on OpenGL 1.0 Direct3D 10 so I see some not-yet-quantifiable benefit in moving however with performance being not an issue for me this benefit is purely architectural. I'll need to see it released to understand if it's worth biting the bullet. I also build objects similar to Pipeline State Objects, as well as the saved bindings so there's some chance going D3D12 might result in smaller code for me or at least in moving it to more controllable sections.
I am wondering however how those "awesome" companies not understanding their trade will fare. You know, those who want the newest stickers (usually big proponents of GL since the API never changes). Those are going to have a nasty surprise!