We're learning a few more things about the Apple Watch. As it stands right now the watch will need to be recharged each evening which means it will yield around a day of use on a single charge, which is in line with most wearable devices sporting high res screens and multiple sensors. This might change as we get closer to the device's shipping date in 2015.
We also learned today that, unlike traditional analog wristwatches and many wearables out there, the Apple Watch can be oriented to right-handed or left-handed users. This is determined when you set the device up the first time. Since the straps of the Apple Watch are super easy to change (no tools needed), you can orient the device however you wish.
Apple Watch will also have around 8GB of storage and can play back music via Bluetooth to a headset even without an iPhone present.