Neovim nightly already has some tools available as plugins. I'm using tree-sitter for syntax highlighting, text objects, and folding right now. Pretty satisfied so far.
The official release of built-in treesitter comes with neovim 0.5. Which looks like it'll be out pretty soon. I've been watching a fairly steady march toward release here: https://github.com/neovim/neovim/milestone/19
