oh come on i was hoping for a little more... :\
And people are hoping for less : people are hoping for it to have its own WiFi, 3G, 4G and LTE antennas, digital compass, gyroscope and GPS. All of this consumes a lot of battery life.
The fact that it's linked to the iPhone probably doubles or triples the battery life, which brings it to 19 hours.
Watch threads, the first gen will be geeks/fanboys, and the 2nd will be people more interested, and the 3rd gen will be common acceptance.