IMHO, they mostly bought Tony Fadell.
In few times, this guy will be one of Google vice-presidents and will support a department related to smartphones.
Fadell has the same obsession as Jobs had for design and user experience (look at Nest), which is sorely lacking with Google.
They also bought Bryan James, vice president of engineering, who worked on the iWatch and who joined Nest.
Apple's board may be fuming once again after Waze's buying
Maybe they should get rid of Cook