interesting chip, but since its faster but no more power efficient, not sure how usefull it will be for mobile devices. The Q3 already has problems with its battery life, if it had the XR2+ instead of the XR2, it would have even worse battery life!
faster can still lead to battery life improvements. if the CPU is able to complete tasks in less time, it can then enter a lower power state sooner which will result in less battery usage overall