All these 3 things are not really happening and we won't see it either, because devs have said before these consoles were that they were going to match each other. Nothing more, nothing less. Both companies improve their tools and api's. There is a reason why Nintendo and Sony not talking openly about all their inhouse tech and api's. It's because they don't have to sell it. Microsofts largest competitor in this field is Vulkan api.
This update has nothing to do with DirectX or any graphics API, and there’s nothing in the Update that has to be ‘sold’ vs Vulkan. Microsoft is talking more openly about this because it’s pretty much their way as a primarily software company with a long history of developer engagement.