A lot of it already works. If you want to play with 2.0 now, you can download it from here:
https://github.com/dotnet/cli/blob/release/2.0.0/README.md#i...
https://github.com/dotnet/cli/blob/release/2.0.0/README.md#i...
> Note: the release/2.0.0 branch of the CLI repo is based on the upcoming v2 of .NET Core and is considered pre-release.
i.e. it's still preview (albeit 2.0.1).