While we know that the new Nexus 4 will support the coveted Miracast feature thanks to Android 4.2, it appears that the Nexus 7 and Nexus 10 will each not support Miracast, despite operating on Android 4.2 as well. There seems to have been a major discussion on a Google Forum on whether or not the tablets would feature Miracast and while some users reported it worked and others didn’t— a user by the name of Eth@n took some time to confirm the following:
“Just wanted to confirm that Nexus 4 is currently our only Nexus device that works with Miracast wireless display on Android 4.2. There was a reference to wireless display on our Help site for Nexus 10, but we’ve since removed that reference. Our apologies for any confusion that may have caused.”
So there you have it— don’t try looking for Miracast for now— unless of course, you have a Nexus 4. Let’s see how Google handles this moving forward and wait for a possible update which should enable the feature for the rest of the Nexus devices out there.
source: Google Product Forums