Plasma Mobile aims to become a complete and open software system for mobile devices. It is designed to give privacy-aware users back the full-control over their information and communication. Plasma Mobile takes a pragmatic approach and is inclusive to 3rd party software, allowing the user to choose which applications and services to use. It provides a seamless experience across multiple devices. Plasma Mobile implements open standards and it is developed in a transparent process that is open for the community to participate in.
Great presentation on the website, but the product itself clearly has a long way to go. You can try it out on a Nexus 5 or a OnePlus One.