To DPOS (Distributed proof of stake) VS bitcoin which is Proof of Work.
It also has distrubted DNS (in the works), a voting platorm (in the works), User Issued Assets (think companies issuing employee stock on the blockchain), BitAssets (stable coins that track a real world counterpart backed up by 3x collateral such as BITUSD).
Some good links for info
http://bytemaster.bitshares.org/ https://bitsharestalk.org/index.php http://www.bitshares.org http://bitshares.tv/ http://www.bitsharesmusicfoundation.org/
http://bytemaster.bitshares.org/guest/2014/12/22/How-BitShar...
This login stuff doesn't seem super interesting, but stable cryptocurrencies do to me. BitAuth[1] is a similar idea for using keypairs for authentication. Neither will take off until there's a huge install base for the wallet software, or browsers have embedded the protocol behind a good UI.
[1] http://blog.bitpay.com/2014/07/01/bitauth-for-decentralized-...