What do you mean? The hoarding of visas by large Indian corporations, or something else?
Wipro Technologies, for instance, already has 1,000 visa-ready professionals based in India waiting for their onsite assignments
They passed out to many of these visas.
The restriction will curtail the flexibility to reinforce onsite teams at various stages in the software development lifecycle (system requirement study, testing and implementation phases)
I guess it doesn't occur to them to hire American "onsite teams".