Resource update - the next frontier of presence?

With all of this M&A activity surrounding presence-based functionality, it's interesting to contemplate what the next step is. There's some interesting work going on at Carnegie-Mellon and MIT on the issue of context-aware mobile phones, which can be viewed here http://www.neemanet.com/projects_sensay.html (includes interesting graphics, academic paper and demonstration video) and here http://www.media.mit.edu/wearables/mithril/photos.html. The current designs are cumbersome, but the concept in application would enrich the whole presence proposition tremendously, whether fixed or wireless.