The new W10 TP camera app is capable of taking HDR photos, and has a slightly different processing algorithm. I have taken a few photos today comparing Lumia Camera (classic version, on a WP8.1 635), W10TP Camera on auto, and W10TP Camera with HDR enabled.
The HDR function works well, bringing out detail and brightening up everything, but the overall image processing algorithm is soft in comparison to the much sharper photos taken with Lumia Camera on WP8.1.
Laundry Room:
Lumia Camera (Classic, W8.1):

W10TP Camera (HDR Disabled):

W10TP Camera (HDR Enabled):
Garden:
Lumia Camera (Classic, W8.1):

W10TP Camera (HDR Disabled):

W10TP Camera (HDR Enabled):
