Imagination's PowerVR GPU's have shipped in every iOS device since the release of the iPhone 3GS and the third-generation iPod touch. Those early devices used the PowerVR SGX, while the iPad and iPhone 4 moved on to the PowerVR SGX 535, and finally the iPad 2 and iPhone 4S came packed with the PowerVR SGX543MP2. At CES today, they got ever-so-slightly more specific regarding the Series6 family of PowerVR GPU's, and it seems incredibly likely that we'll see them included in future iOS devices, judging by Apple's three-generation track record of utilizing Imagination's GPU technology.
Per the press release, gamers will be able to expect 20 times the performance of current generation hardware, along with a 5x boost in efficiency. Imagination has announced that 8 different outfits have signed up to utilize these new GPUs, but curiously enough, only list 6 of the companies. If I were a betting man, I'd put Apple as one of the two unlisted chip makers.
Needless to say, the potential these new GPUs have is just crazy to think about. The iPad 2 and iPhone 4S are already graphical powerhouses capable of rendering beautiful games like Infinity Blade 2, and imagining the next generation of devices potentially being 20 times more powerful is incredible.