One of the main features of NeoVim over VIM is that NeoVIM can be embedded into other programs and new GUIs can be built that use libvim. There are now programs you can download that do that, for example [1]. Certainly, this is still an experimental line of software and I don't use the NeoVIM GUIs and don't claim that this has been proven a success yet, but there are some encouraging signs.
https://github.com/topics/neovim-guis