This week Tigeot re-based the drm/i915 DRM code against what's found in the Linux 4.5 kernel. This update changed around 10,000 lines of driver code within the DragonFlyBSD kernel. By this upgrade the DragonFlyBSD Intel graphics driver has better Skylake and Broxton hardware support, initial Kaby Lake support, and many bug fixes, per this Git message.
Meanwhile, Linux 4.9.0 is set to be released this weekend and there are a lot of i915 changes from Linux 4.5 to 4.9, but still, the DragonFlyBSD (and overall BSD state on most distributions) continues advancing with their open-source graphics driver support and still much better off than a few years back when their DRM driver support was much more rudimentary. Today, it's at least very much usable assuming you aren't on the very recent hardware or affected by a recently fixed Linux kernel DRM bug.