The biggest omissions in Windows Phone 7.8 devices will be lack of OTA updates, NFC capabilities and “real” multitasking. Internet Explorer 10 is also only running on the newest Windows Phones. The list of missing features continues with secure boot, encryption, device management, company hub, and Microsoft Wallet.
Luckily, at least Windows Phone 7.8 devices will get the new small sized Live Tiles, Wi-Fi Tethering and plenty of camera improvements. Check out the full list below.
source: Smartphone France via Electronista