If I remember correct, MS5 now is the only MS left from the original lineup of milestones from way back when, and with ms8 being the 100nm, which we all agree is more from the request of a partner then about validation, so we could presume that validation of the technology is pretty much complete as far as the original design, and now it is about building products and design for industry.
I really don't see where there is any amount of risk left, just time to get products to market and work out details with partners.
Even if we partner with hp as once was indicated, it is nothing to sneeze at, they just reported they sold $8.53 billion in computers last year, and ther printer business did $5 billion, not to mention there military stuff,
that would keep us busy for a while.