Imagination in Apple Licensing dispute selling businesses
theverge.com
theverge.com
There have been little things, like the ST Micro "ChromART" DMA unit that implements what used to be a patented BitBlt operation[1], but wholesale implementation of some of the things 3Dfx and nVidia were doing in the 90's has yet to come to market. (those patents started expiring in 2015 and will dump a huge amount of IP on the market by 2020.)
I'm hoping Apple is successful and that eventually all GPUs are open and easily programmable without proprietary bits.