否，他们已经明确声明这些仅是Windows.在.NET Core 3.0讨论之一中，他们还澄清说他们不打算将来使这些功能跨平台，因为整个概念都源自Windows特定的功能.他们讨论了跨平台应用程序的全新想法的思考，这并不容易.

No, they have clearly stated that these are windows only. In one of the .NET Core 3.0 discussions, they have also clarified that they do not intend to make these features cross-platform in the future since the whole concept is derived from windows specific features. They talked about thinking of a whole new idea for cross-platform applications, which is not easy.

来源: https://youtu.be/HNLZQeu05BY

更新

新发布的.NET 5现在旨在通过不再称为".NET Core"来避免所有这些混乱.

The newly announced .NET 5 now aims in avoiding all this confusion by no longer calling it ".NET Core".

更新2

在blazor客户端(于2020年5月发布)中，有一个针对使用webview的跨平台应用程序的新实验项目正在开发中.

With blazor client-side (releases on may, 2020), there is a new experimental project for cross-platform apps using webview that is in the works.

来源: https://blog.stevensanderson.com/2019/11/01/exploring-lighter-alternatives-to-electron-for-hosting-a-blazor-desktop-app/