Mike,
I saw your post and thought "I wonder if Chromecast would do this?" After a little digging I came up with this article published shortly after Google introduced their Chromecast dongle http://www.droid-life.com/2013/07/26/tip-chromecast-can-cast-your-entire-desktop-screen-too-not-just-tabs/ Note: I have not tested this and have no Idea if it works in reality but here is another option for you to consider and at $35 USD a pop, a fairly inexpensive option at that.
Scott