[Shield Android TV Q&A, Help & Troubleshooting] dreneeps:
Any luck or good leads?

"Allcast reciever"?

What app or apps are you suppose trying to get to your phone?

I've been looking into doing the same thing but to a note 4. I think I found a few ways that seems like they would work for media streaming if your Shield had root access or unrestricted app installation options. Things like allcast reciever and other casting options. They all seemed to have too much latency for gaming if that is what you were wanting to do.

I'm not sure if a chromecast can output audio and video using the HDMI port but that might work if it can do that?

The other issue with pulling this off os that I think the solution needs to be some sort of universal screen and audio mirroring, like googlecast, that doesn't care about what app it is mirroring. Otherwise you'll have to rely on the app that is on the shield being capable of casting, and the Nvidia Hub isn't as far as I know.

I search for terms like: Android to android screen mirroring, android remote display, android remote access, etc....nothing so far.

My most promising hope for doing something like this now are:

1. Making my phone somehow act as or emulate a display, TV, Monitor in a way that can utilize the output from the HDMI port of a SHIELD device. This would bypass all the various issues and complications with specific application capabilities and restrictions, though it is just a idea about how to work around the app issues, I have no idea if this would even be possible. I also don't know if anything that is coming out the HDMI port has any sort of HDCP protection. I would assume that some things would but I would also assume that most of those specific things are the kinds of things. I would just be casting via media players anyway.

2. I have a really REALLY fast LAN network, and I know I am able to remotely access my PC in various ways that are low latency and high performance as far as display and audio are concerned. So, assuming the latency could be kept low enough I have thought about working on getting what I want to access on an Nvidia shield device to my PC running Windows 10, then I can just access that from my phone.

I don't know if you're familiar with that saying about engineering which basically says: "It's not a question of what you want to do but how much you can pay to do it." I say that because there seem to be a couple of fairly good high end Headset based displays out there. One is called the "gylph" or something like that and I have looked fairly thoroughly into one or two others that seemed to be high quality and have reliable reviews and testing available to find online. Some didn't seem available for another year or two, and even then you are going to be dropping $500 to $1,000 for them.

3. Using something like Tridef 3d and a head mounted VR headset based display. I was able to get that working pretty well without too much effort from my PC. The Tri-def software creates a side by side view of the application that you tell it to from your PC. So I can basically get a display output from just about anything on my PC and use it with just about anything they can recieve display output from my PC or remotely view my computers display with low latency. I haven't looked too much to see if something similar to this software is available that can run on a shield device. I would assume they are powerful enough even if you had to scale things down just a little bit.

The kind of set up that could send from your SHIELD, to your PC, to your Head Mounted Display or VR headset could be have some interesting advantages if the overall network latency was low enough. Having the rendering of the initial source on one device and the side by side display conversion on another could have a lot advantages. I own a Samsung gear VR innovator edition headset that I can use with my note 4, but if I want to use it for more than 20 minutes I need to pre-cool my phone in the freezer and to get any significant amount of time I think I would need to develop fairly high performance cooling system. That obviously isn't very easy to do when you need it to interface with a phone you use daily and also be small and light enough to attach to something you're wearing on your face. The point is that doing anything more than receiving and audio and video stream on your phone is going to be very resource intensive for it to handle. Even maxing out the gigabit Wi-Fi on my land for my phone makes it really warm and consumes the battery at a very high rate.

Whatever you do if it is helpful I have connected a pluggable USB 2.0 to Gigabit LAN adapter to the shield portable and it more than doubled the network performance. I'm not sure what the actual LAN performance is on the SHIELD

TV but even if you didn't need to increase it you might be able to reduce latency by by separating the total network load between the internal Gigabit Ethernet port and a separate USB 2.0 or 3.0 lan adapter. I don't know enough about androids capabilities to use more than one network adapter simultaneously four separate purposes to know if that is possible.

Well, congratulations if you've made it this far into my post. I have obviously been exploring this kind of thing for a while but there is a lot potential out there and a lot things that I don't know about or understand thoroughly enough. It's nice to know I'm not completely alone in this specific ambition. Hopefully we can gather a few more people and make some progress with this thread!