I've always seen Google's "Nexus" line of products as essentially prototypes that Google releases into the market to light a fire under device manufacturers to raise the bar for the latest Android OS.

I would be surprised if Android isn't already nearly the dominant OS for enterprise mobile apps. A cheap, stable tablet is a big win for business, as the iPad is pretty expensive. So who says the Nexus 7 isn't a strategic move toward more of Android in the enterprise market?