Technically the GPU hardware is designed to support OpenCL and these are hardware specs so they are not entirely incorrect. However we aspire for the 96Boards website to be helpful too so I agree they need to be corrected. Actually I already filled a bug report for that this morning: https://github.com/96boards/documentation/issues/316 .
Looking down the list I’m pretty sure Renderscript would be in the same category as OpenCL. From a driver point of view I’m not sure which OpenGL ES version is supported nor what the Vulkan status is (although do note that freedreno does actually emulate full OpenGL to allow desktop apps can work… so in some ways it is more capable than presented in the hardware specs).
After that I can’t actually see much else that can’t be done although some features that would be realised on a co-processor on a Snapdragon 820 based phone might end up implemented on the main CPU for the time being and may also require packages that are not included in the images by default (audio decode and post processing, miracast, etc).