If you know how vim-dispatch works, you'll know that it just opens up a split in Tmux/Screen or makes a new tab/window in your terminal emulator to run the command "asynchronously." While it does work, it's definitely a hack and not a feature of Vim.

Correction: Tim Pope managed to hack in a mostly-functional version 4 years ago.

Correction I linked Tim Pope's github page.

That never worked on windows.

You right about that I forgot.