Youtube is already inaccessible in China and has been for at least 3 years.
Google as a search engine is not particularly interesting to the ordinary citizen in China.
I don't know enough about google's presence in China from their corporate perspective, but from the perspective of someone who lived in China and who works with many Chinese, much more importantly than their google.com, are their backend tools, their technical abilities, their industrial and commercial applications. And I think that is where the strife is taking place, not with the public at large.
While I lived over there I introduced a lot of my friends to gmail and gchat. They provided a means out of the Chinese ecosystem through which they could communicate with friends/others around the world. They liked those tools. I think google's decision may in fact affect mostly those people who are in the know, and have less affect on those who tow the common line.