The area energy density of ITER is particularly low. The whole plant is only designed to produce 500MW, on a concrete platform 1000mx400m.

Compare that to this: https://www.google.co.uk/maps/place/Barking+Power+Station,+B... google.co.uk

That's a 20 year old 1GW combined cycle gas plant, in a building roughly 50mx150m. Anything they can do to bring fusion plants smaller than ITER is going to help.