It doesn't change much really EXCEPT, in theory, this means that there is no longer the requirement for a foreign OEM to tie up with an Indian partner and could instead set up 100% owned subsidiaries in India and thus there would be very very little skill or technology transfer to India.
This would seem to fall right into Boeing's hands as they were not willing to partner with an Indian company to produce the F-18 in India.*
However, if the MoD/GoI were to green light such a offer (for fighters) they would be incredibly foolish and short sighted as well as being incredibly disingenuous.
IMHO this move is not aimed at the fighter market at all but ground and naval systems that have been crying out for 100% FDI for a while now.
To be noted, 100% will only be sanctioned for the highest of tech, you can't bring 1970s tech to India and expect to be awarded 100% FDI.
*
@randomradio permission for 100% FDI for Boeing would effectively undermine what you have been saying all along- that the GoI is trying to set up 2 rival INDIAN companies to HAL capable of producing fighters in India. A 100% Boeing subsidiary would be next to useless other than employing a few thousand people, once the fighter order is complete they would scale down and leave India. There would be no "rival" created and no Indian entity would benefit from "know how" gained.
@PARIKRAMA