Well, if that's the case (Netflix taking advantage of the DRM built into the phones), then there's no reason Moonlight for Android can't take advantage of that, too.
Also, Microsoft has licensed their DRM for Linux on embedded devices in the past.
Yes, but since Netflix doesn't use Silverlight for the iPhone/iPad it's not like it's going to make a difference one way or another.
MS has licensed their DRM, but they will not license it for use with Moonlight. From my understanding, the licensing they have done has generally for hardware (the NXP chip in the Roku box, for example).
From what I understand, on the iPhone/iPad Netflix uses the DRM built into the device. Since Android phones are built by several different manufacturers there is no uniformity in hardware DRM (and some phones don't have any at all). I imagine that it's easier to get content providers to agree to use hardware DRM than software DRM which further complicates the issue.