A15 has finally arrived!
This is a first for a mobile device. Some initial (pre-final) lackluster benchmarks notwithstanding, the Nexus 10 is going to be a beast of a tablet. Anandtech's preview of the Exynos 5 Dual shows a memory bandwidth and GPU equal to the Apple A5X in the iPads 3rd and 4th gen; a much-improved CPU than Cortex-A9.
I'm personally very excited with the GPU equation. Since Android has never had an equivalent GPU as what was in the similar generation iPad (CPU yes, but never GPUs). This and the next may be the years that Android OEMs finally achieve hardware parity and even superiority in all respects over Apple. (Or at least until the next iPad gets here.) In any case, it's gonna be exciting. With Google getting serious about hardware now, expect them to give Apple and MS a run for their money.