Does anyone else expect to see an all-out iWatch this year? With Siri, Bluetooth 4.0, etc. it can be one incredible device. Frankly, I find the possibility much more exciting than the upcoming new iPhone debut in Sept.
You are probably thinking of the older implementations of Bluetooth. The current spec allows for 11+ hours of talk time for tiny Bluetooth headsets already on the market.
Compare that to the 24 hours of music playback that the Nano usually gets. Apple likes to keep battery life the same through generations.
Bluetooth is pointless, it doesn't need to work with your phone. It needs to have wifi with Notification Center.
The whole idea of wireless communication is stupid. No thanks. My 6G nano works fine as a watch. The idea of loosing battery life extremely quickly so I don't need to reach into my pocket and pull out my phone is just useless!