yup, the Web Orbiter could run there out of the box, but an orbiter could be built specifically for it as well, all the Linux Orbiter needs is SDL and the Pluto libraries. It is very thin in that respect. (if it can run on my teeny little Nokia 770, it can run on anything)
native orbiters perform MUCH faster than the proxy web orbiter. (and without the page refresh action.)
to answer your question further, only Javascript is needed.
-Thom