It's not available quite yet, but Genesis will eventually be ported to other platforms/architectures. I just wanted to start with a focus of 'one' for simplicity's sake. Genesis (the dashboard) itself is Python so you don't need to worry much about architecture. It's just distro compatibility that needs work. So stay tuned :)

I completely understand the desire to start with one uniform and ubiquitous platform, and eagerly await a cross-distro release :)