DoCoMo's planning to shift 10 million FeliCa handsets in the first year and a half, which we presume means they're going to chip pretty much every new phone they release from now on.
Sensor data is stored on the device for a fixed period of time, and accumulated data can be transferred using a special application and FeliCa technology, a popular smart card system in Japan.
The phones themselves (three 2G and one 3G, the Fujitsu F900iC on the right) involve only minor tweaks to previous models, but the addition of FeliCa and the impressive range of partners DoCoMo's assembled means that your phone can now be used to do a whole host of things.