sofar i have seen xmos chips might be used to controll lcd display modules, say large lcd displays could be controlled by clusters of these chips. if there is going to be any easy out of the box solution for achieving something like that using amigaos and this mobo (and maybe hollywood) it might be interesting for me. i see no other advantage atm.
With a few custom interrupt handlers, anything interrupt driven will be accelerated by the new Xena chip. The fact that it doesn't have to store its registers while processing those interrupts will make it preferred over other interrupt solutions.