.....NV will accelerate the uprising of ARM. ARM needs optimized software stacks. NV has some of the brightest minds - and can (and will) be able to bring a lot to the table.
Is NV coming the accelerate ARM (and its licenses ) or is NV out to accelerate NV's products ? The latter isn't necessarily going to accelerate ARM.
Nvidia buying ARM so that all of ARM's current customers do better is a vastly different objective of buying ARM so Nvidia can over time suck up most of the profitable business that ARM's current customers do.
ARM doesn't necessarily need a large amount of more brightness minds. What ARM needs most is a steady investment flow and a non short term extraction of profits. Selling more IP to a wider base of SoC implementer at products that have a higher profit margin for the implementers ( not sucking most of that money back directly back into ARM's owner's pockets. )
ARM makes money but it isn't even and it needs broader, diverse sources. What it doesn't need is some hand waving plan of how there is a "big pot of gold" of magic synergy profits or some other huge pay off that would justify some wildly large multple being put on the companies purchase price .... ( more likely to bring more MBA 'brains" than tech brains to the 'problem'. )
If this deal sucks up too much of Nvidia cash then there are sufficient long term investment issues that could lead to problems. If this deals has way too high percentage of "monopoly money" stock component to it then that has other hiccup issues downstream. Again buying with 'bubble' money often leads to problems later. ( Softbank choked on ARM that's why it is being sold now. )
Nvidia is probably going to talk some 'story' about how they aren't going to damage consumer choice to get back the antitrust regulators in EU/China/US/UK , but how much of that is 'smoke' and how much they are actually going to do long term is questionable at this point in time.