[EDIT]: This tool has now been deprecated and repaced with ARFoundation Remote , which seems to also be on the backburner.
[/EDIT]
Not sure how public this knowledge is but ARCore Remote is here.
Using the experimental ARInterface, it works in a very similar way to the ARKit Remote.
Github Repo:
https://github.com/Unity-Technologies/experimental-ARInterface
A quick YouTube walkthrough I made:
Nice!!!
I just ran into an issue where the RemoteDevice scene on the phone was working with the Unity editor, but after disconnecting the phone, it would no longer connect.
I found that in the build process it sends a command to create an adb forward socket connection and I’m guessing that when its unpluged, the connection is lost and needs to be reestablished next time your phone connects to the PC/adb server.
I was able to get it work by entering this command from the command prompt.
SOLUTION: adb.exe -s “adb devices name” forward “tcp:34999” “localabstract:Unity-PackageName”
Example: adb.exe -s “123456789” forward “tcp:34999” “localabstract:Unity-com.test.testing”
Get the device name from “adb devices”.
Get the Unity Package Name from: Edit → Preferences → Project Settings → Player → Other Settings → Identification → Package Name.
Hope this helps! Having to rebuild to see changes is very slow. So I’m very happy to see Unity getting the remote working this early on. 
I cant get the camera view after 1.0 update.
@l7ocHoliday Thx! This worked. It was driving me LOCO. I also have the problem of not being able to get the camera feed, it’s just a pink screen, although it is clearly finding surfaces and tracking movement… using a galaxy s7… I wonder if a different phone would work… $$$$ 
Actually here is a fix for the missing camera feed… now working!
I know this is old, but was anybody able to get AR Remote to work with their Android phone on Mac? It seems like it never gets a connection, although it says it is connected in the editor, but there is no camera feed.
If you’re still looking for the up-to-date editor remote implementation for ARCore, I recently wrote a plugin just for that. It’s based on AR Foundation, so ARKit is supported too.
AR Foundation Editor Remote plugin: