It's a novel "Proof of" algorithm (Proof of Space and Time) that front loads the resource needs into a Plotting phase, with a very efficient Farming phase after that to process blocks with transactions. Seems like a much more fair, sustainable model for having a secure digital currency.
It also has an interesting, Lisp based programming language on it.
But what excites me is that it's lead by Bram Cohen, the dude who invented BitTorrent, one of the best pieces of tech I've used nearly my whole tech life.