What to watch at Apple launch

Price and life of batteries expected to be key issues for wearables

The test for Tim Cook last September was to prove that Apple could still come up with innovative products, so he revealed a smartwatch. His next test was set for Monday: convincing you to buy it.

Apple's chief executive officer returns to the spotlight to answer questions on many of the device's key selling points, including price range, battery life and when in April the watch will reach stores (and in which countries).