The Apple Watch is set to launch in April, with estimates suggesting 20 million units will be shipped in its first year, far surpassing the 720k units shipped by Samsung and LG in 2014. Key features include pressure sensitivity and haptic feedback, alongside voice commands via Siri, while initially health features will be omitted due to instability. The smartwatch market is expected to grow significantly, with projections of 91.6 million units sold globally by 2018, driven largely by the Apple Watch's anticipated success.