On the other hand, Nokia was the largest global handset seller at a time virtually nobody in the US market knew what it was. Ignoring the US market is viable, and the US market isn't for everyone. Look how many car manufacturers have tried and failed to make a go of it. (At least Americans can pronounce Nokia. Peugeot didn't stand a chance.)
Statistics (http://en.wikipedia.org/wiki/List_of_countries_by_number_of_...) would disagree with you.
If the US market is 3X smaller than China's (by volume), but spends 3X more for each phone, then the markets are roughly equivalent in the terms that a company would care about: profits.
From a purely selfish point of view (European software developer) I say bring it on, saddling U.S. software companies with these ridiculous rules should eventually make my life easier competing against them. I'll quite happily infringe these "patents" and sell my good outside the U.S.