This has been going on for a while now. Apple threw the first punch against HTC over a year ago. They even tried this a LONG time ago against Palm. But Palm basically said "Fuck you, have you seen our 20 year patent history? We've been making patents on touchscreen devices since before there were touchscreens."
The same thing is happening with HTC and Samsung now. Apple has violated just as many patents as Android has, so the lawsuits aren't going anywhere.