- Vulkan support.
- Direct3D 12 support.
- Game controllers support.
Some of this was already possible using extra utilities to get vulkan going. DXVK would translate DirectX calls to Vulkan. But now it's native to Wine itself.
This is after months of progress in other areas of Linux gaming. Tools like Lutris have matured quite a bit, to help you get the precise Wine setup you need to run specific games, and Steam's Proton (a distribution of Wine) is getting better and better, with more successes than failures in getting Windows games running on Linux from the reports I've seen.
Wine 4.0, once it has gone through some rounds of testing, will most likely show up in Proton soon and make the process even smoother.
It seems like every week there's new major news about advancements in translating Windows native games to run better and better in Linux. I've been planning to jump in and test things out myself "once it calms down a bit" but it doesn't seem like that's going to happen as the technology is rapidly changing.
You heard it here first, folks: 2019 IS THE YEAR OF THE LINUX DESKTOP!
Check out the full patch notes for 4.0 here: https://www.winehq.org/announce/4.0