It's currently heavily focused towards The Netherlands, where citizens can obtain attributes from the Dutch civil registry, such as name, home address and age. These attributes can then be selectively disclosed directly to a relying party, without the identity provider being able to see the transaction [4]. Multiple disclosures are also unlinkable as long as the attributes themselves are not identifying.
It's not currently using the verifiable claims data model, but it would very much fit it. It also doesn't use a 'blockchain', simply because it's not necessary to do so, and makes it all a lot less complicated.
[1] https://itunes.apple.com/gb/app/irma-authenticatie/id1294092... or https://play.google.com/store/apps/details?id=org.irmacard.c...
[2] https://github.com/privacybydesign
[3] https://privacybydesign.foundation/publications/
[4] https://privacybydesign.foundation/meeting-slides/slides-8-3...