Also I hope that they're aware of which Intel chipsets contain PowerVR graphics and steer clear of selling any systems with those. https://en.wikipedia.org/wiki/List_of_Intel_graphics_process...
from disclaimers import IANAL
Basically, proprietary PowerVR graphics chip driver source was leaked. Anyone who has read the leaked code is considered "tainted" and is unable to contribute to the open-soruce, cleanroom implementation alternative PowerVR drivers.
It generally makes it difficult for ANYONE to develop open-source PowerVR drivers, as their lawyers could argue that they had seen the leaked source code and copied it (regardless of whether or not that fact is true).