Decentralized, anonymized identity is one application. It sounds amazing in theory - and can work for the general use cases of sharing information with corporations. But, I believe it won't really be anonymized, as "data exhaust", "identity touch points revealing identity in aggregate" can help identify.
An example I use, is people expect bitcoin is anonymous. Yes, it is anonymous to the general layperson and corporation - but not to say NSA/FBI for "people of interest". And once bitcoin to USDollar transactions or financial institutions are more common - banks will sell your wallet information to credit bureaus, and eventually corporations will be able to de-anonymize chains for profiling just as today.
An example I use, is people expect bitcoin is anonymous. Yes, it is anonymous to the general layperson and corporation - but not to say NSA/FBI for "people of interest". And once bitcoin to USDollar transactions or financial institutions are more common - banks will sell your wallet information to credit bureaus, and eventually corporations will be able to de-anonymize chains for profiling just as today.