It took me 30 minutes (between writing a previous post and this) to figure out how to use Desktop Embedder and run the app on the desktop. Now, desktop support is still under heavy development and require separate building steps for different OS-es, plus small additions of harnessing code to the main function. However, I even added native OS menu support in a couple of minutes.
Status-Flutter on Desktop:
There is also a Google’s project HummingBird – Flutter for Web – they try to find the best way to map rendered image onto web – either by using CSS Paint API, or WebGL or something else. At some point, Flutter apps will run in the browser, with or without WASM.