The Jetson TK1 can handle an Ubuntu setup similar to the old Tegra 3 "Cardhu" tablet. This $192 ARM board featurews the Tegra K1 SoC with four Cortex A15 cores plus a fifth low-power companion core, the Kepler GPU with 192 CUDA cores, 2GB of memory, 16GB integrated eMMC memory, a half mini PCI-E slot, one SD/MMC connector, USB 3.0, GIgabit Ethernet, and a SATA port.
It looked like the Jetson TK1 would be delayed to mid-May based upon reported availability from Micro-Center and NewEgg, but I've just received an email this evening that NVIDIA has shipped out my Jetson TK1 board! This new NVIDIA ARM board should be arriving in the morning thanks to overnight shipping. Stay tuned for a ton of benchmarks from this interesting Tegra K1 platform.