Tree-sitter highlighting is interesting. I usually find emacs to have slightly worse syntax highlighting than other editors for most languages I use.
When I've mentioned this before someone usually explains why I am wrong and it is actually superior or whatever. I do not care I don't like it as much. It's nowhere near enough to drop emacs over but if this changes it I might prefer it.
I don't know what this fork brings to table, but you could try tree-sitter today with your vanilla Emacs using a package[1] that works via dynamic module.
Personally I am more interested in getting structural selection and navigation reliably working for any language. There is also a package named combobulate[2] to help with that.