Samsung may be already working on a 2 GHz dual-core Exynos processor
The same Samsung official also mentioned that the said 2 GHz processor is expected to debut in one of the company's future smartphones by the end of 2012 and will most probably join the Exynos family of mobile CPUs. What is also worth noting is that Samsung might sell the chip to other manufacturers as well, though a wholesale price is probably too early to announce at this time. However, it is still too early to get excited about all this since Samsung's 2 GHz processor is nothing more than a blueprint for now. There are probably a ton of issues such as heat dissipation and battery life that will need to be tackled before using the chip in a smartphone becomes feasible.
source: Maeli via Samsung Hub