What has Apple done in the past few years? Since Steve Jobs passed away in 2011, the spirit of innovation seems to be gone. Apple has mainly been getting by on product updates that are not all that exciting. Ooh. A smaller iPad! A bigger iPhone! iYawn!
Maybe Apple is employing the rope-a-dope strategy that Muhammad Ali famously used against George Foreman in the Rumble in the Jungle in 1974. Google could be expending a lot of energy (and cash) on various acquisitions while Apple sits back and waits for the best opportunity to finally punch back. (Since Google is Foreman in my analogy, does that mean Nest will soon make an indoor grill that talks with your fridge? Hmm.)
But even if Apple is biding its time, absorbing everything Google has to throw at it and hoping that Google will suffer a misstep from doing one deal too many, it's clear that Apple will eventually have to fight back. And sooner rather than later.