Update lock screen and custom background
Internet explorer 11
Shape writing, which is just like Swype
Word Flow Keyboard which is Guinness book record holder for being fastest keyboard
Incoming calls can be seamlessly redirected to Skype video call with a click
WP8.1 starts rolling out in next few months. For new phones in April end / Early May
Universal apps. Buy apps once, use for both Windows Phones & Windows devices, great news!!