The XCore chip proposed atm is the lower end version, that, and the Xorro slot suggests to me it's meant to be treated like the Clockport on the A1200 or the expansion slot of the A500. The onboard XCore will therefore mostly handle I/O and communication between add on boards and the OS.
But, seeing the price of the xcore chips and the fact that the Xorro slot is in a standard format, suggests that add-on boards could be built pretty cheaply.
Eg imagine an add-on board to run the lights/sound equipment of a small theatre. Because of the nature of XCore, timings are going to be good, and you could scale the whole thing up by simply adding another board.
