As one example of an engineering process for embedded user interfaces I shared our experience with developing Gazemarks . Gazemarks is a technology based on eye-gaze tracking that reduced the time required for attention switching. It eases tasks that require the user to move attention repeatedly between 2 or more displays or between the real world and a set of digital displays. Application domains could be looking at the street and at the satnav while driving or switching attention between a screen in an operating theatre and the patient.
When investigating development from an embedded user interface to interactive ubiquitous computing systems further issues come up. As we investigate the PDnet project  with public displays we see that the concerns of the stakeholders play a much bigger role than in traditional systems and that finding an appropriate business model is very close to the user interface development process.
In the final part of the talk I shared a future vision of how technology may change the way we live. In the not so distant future we could imagine that the traditional boundaries of perception (mainly temporal and spatial) will fall . This would create an entirely new experience where "Perception beyond the here a now" change fundamentally the way we see and experience the world. The slides of the keynote are available in as PDF.
From the research we did over the last 15 years I picked some lessons learned:
- Novelty may be about the values/ethics
- Implement it and try it out!
- 20% who like the UI/system are a large market
- Humans are smart and adaptive
- Design for creative users
 Pdnet project homepage: http://pd-net.org/
 Albrecht Schmidt, Marc Langheinrich, and Kritian Kersting. 2011. Perception beyond the Here and Now. Computer 44, 2 (February 2011), 86-88. DOI=10.1109/MC.2011.54 http://dx.doi.org/10.1109/MC.2011.54