Perhaps those who think Google is worried should read this 1st
http://www.xda-developers.com/android/the-sleeping-giant-may-have-awoken/
With the finalized acquisition of Motorola by Google in May, it seemed like it was only a matter of time before Google would stop letting its hardware partners be attacked by Apple and would take a stand. On Friday Google did just that, filing a patent-infringement lawsuit against Apple for the following seven patents: 5,883,580, 5,922,047, 6,425,002, 6,983,370, 6,493,673,7,007,064 and 7,383,983.
The products they are seeking an import ban on are the Apples iPod Touch, the iPhone 3GS, 4 and 4S, the iPad 2 and the new iPad, as well as the Mac Pro, iMac, Mac mini, MacBook Pro and MacBook Air and all other Apple devices which utilize wireless communication technologies to manage various messages and content. Motorola also argues Apple was fully aware of the patents in question.
The obvious worst-case scenario for Apple would be that all of their products would be banned in the U.S. until they resolve the issue. I dont believe anyone sees the worst-case scenario happening, but it would not be surprising to see some sort of preliminary injunction until the International Trade Commission (ITC) makes a ruling which is scheduled for August 24.