All the mobile SoCs in the market available today, except for the Qualcomm S4 Krait, are based on the Cortex-A9 architecture. The Qualcomm S4 SoC is a custom designed SoC and is a hybrid Cortex-A9/A15 competitor. The Cortex-A15 based SoCs are expected to be available later this year, or sometime early next year. The OMAP5, Exynos 5 Dual, and the Tegra 4 are the Cortex-A15 based SoCs to watch out for.
Samsung today became the first SoC maker to announce its Cortex-A15 based SoCs, the Exynos 5 Dual. The Exynos 5250 will pack two 1.7GHz Cortex-A15 cores based on the 32nm HKMG process, along with the T604 GPU from ARM. The SoC supports a whole bunch of specifications and standards including Wi-Fi Display, OpenGL ES 3.0, OpenVG 1.1, Open CL 1.1, DirectX 11, LPDDR3 RAM, SATA III controllers, and the ability to encode and decode videos at 1080p resolution with 60 FPS.
If the above standards confuse you, then in a simple word, the Exynos 5 Dual is a beast. Rumors suggest that the Exynos 5 Dual might be used by Samsung in one of its upcoming Retina-Display resolution like tablets, which is supposed to release sometime before the end of this year.
However, don’t get your hopes too high on this. The Exynos 5 Dual might just show up directly on the Galaxy S4 next year. Some Exynos 5 Dual commits were found by codeworkx earlier this year in AOSP. So it is very much possible that the next Nexus from Google will use the Exynos 5250 SoC. Only time will answer when the Exynos 5250 SoC based devices will hit the market.
The whole white page and other specs of the Exynos 5 Dual SoC can be found here.