Just a quick heads up here ... We've been testing the Netgear PTV3000 Miracast adapter. And while the Nexus 4 can see it, it can't actually connect to it. I've been talking with JR Raphael from Computer World (and @androidpower fame), as he got one, too. Apparently (and this is noted in the fine print) the PTV3000 is a "pre-compliant device," and JR got Google to confirm as much.
So nobody go out and buy one just yet.
So nobody go out and buy one just yet.