I'm hoping within a few years monoprice has a wall unit like this that will hold an 84" display http://www.monoprice.com/Product/?c_id=109&cp_id=10917&cs_id=1091703&p_id=10469&seq=1&format=1 I got that for my current 65" Sony 4K and really like it. It makes it easy to get to my connections (2 HDMI, 1 NIC, 1 optical and 1 power). Mounting was easy. I miss the built in level on the old monoprice I have. This unit however wouldn't support the weight of a current 84" and I doubt they'll cut the weight of an 84" in half within the next few years.
Hopefully within that same few years Oppo or Denon will have something comparable to the AVP with HDMI 2.x and a few other updates. It would be wonderful if they make the HDMI component as easy to replace as a video card on the next model as who knows when HDMI 3.x or even 2.5 will be out.