Wireless HD video is still very much in its infancy. I wouldn't be surprised, without some trade offs or interesting engineering tricks that you won't see what you want in this or the next generation of smart phones.
The most field tested piece of affordable equipment is the Teradek Cube
http://www.bhphotovideo.com/c/product/800190-REG/Teradek_CUBE_250_450_Cube_...
You'll want to bundle that with a field monitor like a 7" battery powered Marshall.
Angelo Lorenzo
Fallen Empire - Digital Production Services