That’s an unofficial source of information, and does not represents the GameWorks solutions in any form. There is however the official site explaining the available features of the GW solutions which i’d recommend you to read instead. Most (not all but most) of the features mentioned on the official site are actually available in UE4 builds which @ was kind enough to pull together into one branch already. The features you are missing doesn’t appear to be part of the GameWorks, but as i mentioned before UE4 have competitive solutions as replacement that you can use, eg Screen Space Reflection was a from day 1. Some of the others you can recreate by yourself, using UE4’s built in tools like the rain texture or the tessellated terrain features.