Also, wether or not ATI would do the same thing if they were in that position is irrelevant. Sure, lots of corporations do wrong when given the opportunity, but that doesn't mean we should ignore (or worse, excuse) it.
Absolutely. If you feel the need to boycott a specific company because of unfair treatment of consumers, particularly their own. Then knock yourself out.
This whole discussion is kind of a moot point however, because games that have PhysX physics still work on systems with ATi graphics cards, albeit using CPU calculation instead of GPU calculation. Do you honestly expect Nvidia to put forth the money and time to R&D to ensure their own GPU acceleration works with ATI cards? Also, would you expect a company with a unique feature that can be a selling point willingly shoot themselves in the foot by giving the capability to the competition for free after put out the money to develop it for their own products? Just food for thought