I don't think you understand where Google business is going. See, even with 60% of market share with Android, Google still makes less money in a whole year with Android ads than Samsung does in a quarter. Mobile ads just don't pay that much. It's clear to Google that even if they get 80% of market share (which is very unlikely), they'll still make less money on mobile ads in a year than Samsung does in a quarter by selling phones, not to mention Apple.

I think Google is going to go full on with Motorola and start selling their own phones. If they can manage to grab 10 or 20% of market share, they'll make way more money than with mobile ads now. And with HTC and Samsung eyeing on Windows8, Google may be forced to ship its own phones anyway. That's just my opinion obviously but it's easy to see they're taking Motorola very seriously (and is not just a patent deal) given that they put one of their best guy in charge.