All large companies have the same IP strategy and they behave exactly the same simply because they can.
Sorry. Google, Motorola, Samsung, etc. have used patents purely in defensive mode. Apple, Microsoft, Oracle, Erricsson etc. are the litigious bastards.
If these patents would be worthless, they wouldn't pay anything in the first place.
When these patenting agreements were drawn up, Android had a much smaller marketshare. So rather than getting caught up in litgation, some large Android makers chose to pay. But not Motorola, and they are yet to pay a penny. Now that Android is the undisputed king in mobile and tablets, even Microsoft making Android devices through Nokia; there is not much compulsion to continue paying.
Phones and tablets do not replace desktops and laptops.
Agreed, they don't. However people hesitate a lot before upgrading the desktop OS. And desktops and laptops last more than 8 to 12 years, so not much revefnue for Microsoft from those markets. Hence my prediction that they are doomed.