It's a great concept but it will remain disabled on my devices until more apps support it.

This "channel" update is so alpha.

Earlier, it was picking up the prime too but after I reset my mibox, it never came back. Plex channel keeps deactivating/no-channel. Same happens with YouTube sometimes.

Netflix has channel for only one profile.

I wish Google was serious about androidTV channels app too.

I mean, we have android tv apps from almost all major channel companies, star, sony, viacom, zee, etc which has live channels inside the apps for a paid service but unfortunately if I were to cut my cable I would have to switch to 10 different apps again and again, not convinient at all.

Same goes for these many subscription apps like, prime, Netflix, cbs, boomerang etc.

Reelgood is the best option out there at the moment but it's iOS exclusive. :(

I have never seen it work like that for any other channel other than Google Play Movies as shown in your screenshot. For Netflix, Emby, etc. you have manually add items to that list. So to me, it seems to be kind of useless as Play Movies is not a channel I use very often. Even after you manually add something from Netflix for example, you have to also manually remove it after you are finished watching.

Plex and Nvidia Games appears for me, I use them daily.

The Plex ones are really cool. You can just quickly jump back to whatever series or movie you left partly unseen the last time. Or it will suggest you the next episode of the show.