John Bruno is a former ATI and AMD engineer who now became System Architect within the Apple company. If you have knowledge about the technology field, then you know that ATI was one of the largest companies producing graphics cards and in 2006 it was acquired by AMD, which is the second largest manufacturer of processors for computers, laptops , etc. In 2011 John Bruno was fired by AMD and now works at Apple where he will contribute to the development of future processors that will be implemented in iDevices.
From my point of view, the hiring is extremely important for those at Apple because they now have a man with a lot of experience in their team, a man who can help them improve future processors. Of course, his work could only be felt in a few years, but I for one am confident that he will leave his strong mark on future Apple products.
