Yet to me, the big story here isn't that one company (admittedly an important technology leader) appears to be headed out of China. It's that China has a well-developed hacker network targeting high-technology companies doing business both inside and outside the country. Despite all the bowing and scraping those companies were doing to the Chinese government to stay in the country, it wasn't enough. China clearly won't be happy unless they have turned those companies into fully-cooperative branches of the government.
Let's not forget why China wants this information. They want to wipe out any dissenting political thought or word. The technology that we all enjoy is unfortunately making that easier. Whether it's through overt cooperation or covert espionage, the infrastructure of the Internet is giving China's government the opportunity to exercise even more control over their people.
Clearly, any company that wants to do business in a country needs to comply with that country's laws. China was seen as such a prize that many US-based companies were willing to overlook the oppressive Chinese government and hide behind the oak leaf that they were merely following the laws. Now they know the government feels it need not do the same.