That will change when pressure will grow. Same as ActiveX was driven out by standard Web technologies. Lock-in freaks will try to resist, but they can only delay it.

> No, indies will demand it.

> AAA studios are doing quite fine with the current API that are even lower than Vulkan.

Meaning of "AAA" is totally mixed up, so there is no point to use this term without explaining what you mean. Indie might mean independent indeed, but what AAA stands for is completely ambiguous. You might mean projects with big budgets, but they can be independent as well (Star Citizen), so you can't use it as some universal category. For the reference Star Citizen is going to use Vulkan.

Regardless of what "AAA" is supposed to mean, they will use whatever will cut their costs to do the job well enough. And cross platform options surely will, if they'll be available.