^ It's all about hooking you into the Google play store and services. Swapping hardware is easy, swapping ecosystems is **** hard when you've got a dump load of apps, games, films, books and accessories like the Q/ATV etc.
If I wanted to upgrade my Nexus 7 to bigger tablet would I choose the iPad (with no software, less viewable content and accessories that won't connect) or that nice 11" Samsung Galaxy (and keep all my apps, games, books and other ecosystem specific stuff?)
That's a no brainier right?
It's the exact same as Apple, you get locked to one or the other and then your pretty much stuck unless you sacrifice everything you have built up with Google/Apple.
So it basically comes down to who your gonna side with.
For me I don't want to be locked into Apple for the simple reason that while they make quality products they never have competition within their own ecosystem, which means once your locked into Apple they dictate pricing to you and you can never go back.
However with Google you can never be ripped off with product pricing, competition is healthy so I'll choose to side with them.