We've already implemented 18 of the 100+ resources, using Meteor.js, and have definitely been seeing benefits across all of our projects.

http://clinical.meteorapp.com/release/1.3.1-rc14

On the customer/sales side, a client asks for a project, we agree on which FHIR resources to use, and voila! On the technical side we have our data architecture, schemas, wire protocols, and data storage. Which means we can get products out the door in a fraction of the time.

After implementing three or four apps with FHIR resources, we connected them to the same database, and they all immediately started working together as a microservice architecture. Plus, we know that we're ready to hydrate the apps with production data when the time is ready.

And at the end of the day, all that means we can spend more time on clinical problems, rather than technical ones. Can't recommend FHIR enough.

As a former practitioner who worked to unite disparate silos of clinical data I can certainly get behind a spec that has industry support. The degree of support is yet to be determined but something is better than nothing. As I see it, HL7's FHIR is the only game in town. It's incumbent upon vendors to participate in the spirit of integration and openness. Further, it's incumbent upon Providers to not block innovation within their environments as data protectors, aka gatekeepers, are oft want to do.

Author here, would love to hear if anyone has been using FHIR in testing or production recently - thanks.