Eddy, in fairness to Mugen, and others in the Zero race, they are not trying to showcase ther products, as they dont have any products to sell. ( execpt maybe for Brammo)
This is more of a 'willy waving' exercise on Mugens part of what they can do from a technical perspective.
The merits of if the TT is the correct place to do it is another matter, but if we are going to have a 'pretend green' race, then I would rather see a grid full of Mugen type quality bikes than some of the lash ups that we have seen so far.