I think it's an interesting idea, but I feel like creating a whole new language has too much overhead for adoption. You would need to create a language server and extensions for every editor you want to support.

A language-specific DSL (Pulumi, CDK, etc) just works in any editor that already supports your language.

This is a similar reason to why I dislike most docblock-based infra tools as well. If wing is confident in their ability to maintain editor tooling, more power to them, but it isn't maintenance I would want to manage.