Matt Warman:

So the tie-up, now approved by European and American regulators, is about more than simply patents, as Google’s executive chairman Eric Schmidt has himself acknowledged. Any visitor to both Motorola’s substantial stand at Mobile World Congress and Google’s I/O conference in 2011, however, could probably have guessed that.
At MWC, Moto’s representatives were as keen to show you the security alarms, the set-top boxes and the other emerging technologies as they were the tablets and the mobile phones. Cut to Google’s own show, I/O, and there the company demonstrated its plans for Android@home, with tablets turning on lights and used to stream music. The fit is about much more than patents.

MMI's home business is the profitable side. The handset business loses money.