Ubuntu 13.04 will feature better support for the Samsung Chromebook that's powered by the Samsung Exynos 5 Dual ARM SoC.
The Samsung Series 5 Chromebook is one of my favorite pieces of hardware right now since it's one of the first PCs using the Samsung Exynos 5, or more particularly an ARM Cortex-A15 SoC. The Cortex-A15 is very fast when compared to the Cortex-A9 and even some Intel x86 CPUs. Ubuntu Linux runs very fast on the ARM Cortex-A15 and overall I've been enjoying the performance and feature-set out of this latest generation SoC from Samsung.
For any developers looking for an ARM development platform or any ARM hardware in general, I highly recommend the Samsung Chromebook as its one of the few devices in the marketplace at the moment to sport an A15 dual-core processor. The price also isn't bad (circa $250 USD), which is basically priced the same as the Exynos 5 ArndaleBoard.