Saumsung announced the Android 4.3 update is about to release in the coming weeks for Galaxy Note2, Galaxy S3 and S4. according to the announcement, the Premium Suite update will be rolled out today in US first by Verizon (read the official Samsung announcement for the update here)

this update adds KNOX, plus some enchancements for the camera, etc, while those highly expected new features from the Galaxy Note 3 are unlikely to be included completely but Group Play 2.5 is shipped in this update