A bit later than initially planned Vulkan 1.1 was released to the public yesterday, as usual with day-one driver support by most of the IHVs.
Vulkan 1.1 promoted several extension to the core and also adds interesting new functionality like vendor independent subgroup operations.
You can get all the details at the Khronos Vulkan landing page.
Note that all my open source examples, demos and applications will work fine with Vulkan 1.1 SDK and drivers. I’m already planing to add 1.1 specific functions to the Vulkan Hardware Capability Viewer and my examples.