It's a no brainer to suggest the future challenges for UX designers will not be bound to the desktop or mobile device.
Our things are smart and will become smarter. Knowing how to design for context, how to design and utilise invisible technology to inform and support people, and knowing when it's appropriate will be the base skills for future UX professionals.
Smart things is a practical book design to address those topics. Introducing the language of Ubicomp through the lens of User experience, It's a great introduction to the future of UX.
Kuniavsky book "Observing the user experience" is a classic UX Books and i've no doubt that Smart Things will have the same status in the Ubiquitous computing community.