Microsoft is hoping to attract the eyes and brains of iOS developers with a new design guide. The Windows Dev Center example shows the common differences in layout between an iOS app and Windows' new Metro interface, including not just the look, but how certain commands would unfold and how either would respond to gestures.
The most important element of this is an explanation of "contracts", or agreements between applications and Windows 8 that gives them permission to share files, or search between each other, play out to other audio sources, or toggle settings. This isn't a step-by-step instruction guide, but it shows that Microsoft sees iPad developers as a big step in their Windows 8 tablet plans.
Microsoft played out similar actions when rolling out Windows Phone, where they tried to lure iPhone developers. Microsoft's guides eventually led to tools to more directly help port apps, and even pay for ports with guarantees whether or not an app sold well. Microsoft seem to be trying very hard. On top of this, the Redmond-based company is also trying to lure traditional PC developers, using Intel-based systems, as well as ARM-based tablets that are more suited to combat Apple's iPad.