very very thanks to confirm this. But it means only Lumia camera features coming to Lumia denim..The features of Lumia Denim are listed here at the Nokia website: Full of features: Lumia Denim Update - Lumia Conversations
If you are on the Developer Preview chain, you already have some most of the features of Denim in Windows 8.1 Update 1. However, the firmware features of Denim can't be delivered with the DP, firmware updates must be released by the carrier.