From the updated Anandtech N4 review:
http://www.anandtech.com/show/6440/google-nexus-4-review/4
"...at present there really aren’t any Miracast standardized receivers. I tried a Netgear model which was pre-certification but couldn’t get the Nexus 4 to attach, although I’m told Netgear will update the NTV300SL to support Miracast by mid-December. I’d expect that the rest of their lineup will be ready around then.
"Until we have Miracast sinks everywhere there’s really no way for me to test how this works on the Nexus 4. The Nexus 10 doesn’t include Miracast support, I’m guessing because of memory bandwidth reasons possibly involved in scaling and encoding 2560x1600."
http://www.anandtech.com/show/6440/google-nexus-4-review/4
"...at present there really aren’t any Miracast standardized receivers. I tried a Netgear model which was pre-certification but couldn’t get the Nexus 4 to attach, although I’m told Netgear will update the NTV300SL to support Miracast by mid-December. I’d expect that the rest of their lineup will be ready around then.
"Until we have Miracast sinks everywhere there’s really no way for me to test how this works on the Nexus 4. The Nexus 10 doesn’t include Miracast support, I’m guessing because of memory bandwidth reasons possibly involved in scaling and encoding 2560x1600."