The UBI is only the first step to ubiquitous computing.
Think an environment-aware version of Siri — with sensors that allow for remote monitoring of temperature, humidity, air pressure, and ambient light, for starters. Plus the usual Siri Internet information look up stuff — but no cell phone (or computer) required.
The promo also says I should be able to use it to do Internet searches, send text messages and emails, ask questions, have it set timers and reminders, etc. — all hands-free.