Freegorifero always has great design ideas, especially around mobile. In this article, he notes that context is usually about some use case and not something in relation to how specific people would use something (for example, think of context of a ramp for handicap or someone with a stroller, instead of just the ramp).
Read this and more at the link below.
Link: f r e e g o r i f e r o | weblog.
It is about time that we start to relate to the interface not anymore as the layer between us and our devices, but between us and the world surrounding us, both the world of space/time and the world of relationships.