Top 5 companies asserting IP against Android are collectively worth $734 billion
fosspatents.blogspot.com
fosspatents.blogspot.com
I think the fact that major players are suing Android just is another sign of its crazy success and the fact that Google is a relative newcomer to the field. Also I'd really like to know why Florian keeps publishing weird, illogical attacks on Android.
In terms of what the other companies would do, the question you have to answer is why there isn't similar litigation in connection with Apple's iOS.