[pcwalton]

Seconding this. I use an ODROID XU3 (the earlier model) for testing Servo on multicore ARM and it's surprisingly fast, especially if your workload parallelizes. It's amazing how much CPU/GPU power you can get for $75, and since it's both parallel, cheap, and based on a mainstream consumer SoC I would love for it to be a harbinger of things to come :)

What holds it back is the I/O (though I haven't tried using eMMC, which is probably a huge improvement) and driver issues, especially around graphics (the never-ending problem with ARM SoCs).