A combo-app that translated that text into a visual todo list (or other mechanism) makes more sense for 90% of users. Sort of like integrations into a more robust email client. You know like Outlook, but modern.
I liked the ability to be able to use the service from any client. And see the widget as an extension that would increase the usability.
The biggest barrier I believe is people learning the language in the first place to be able to perform these action items.