[CiNcH]

Google have taken too long implementing a new colorspace API in Android Oreo and look to be having trouble getting video streaming Apps developers onboard to use the new Android TV Oreo interface properly. This looks to now be causing Android TV OS Oreo update delays.
I would say Android TV market share has something to do with it too for the lack of App developer enthusiasm shown.

Exactly. I also detailed this in my review. Some quotes:

Apps from all major content providers are WebViews only, all having a different look and feel to them, not following any of the Android TV design guidelines. There are simply too many TV platforms around which is the reason why content providers prefer easy portability over a truly integrated user experience. Some even only support Chromecast which adds up to the fact that Android TV is such an inconsistent platform.

Also, after the Google TV disaster, not many seem to trust in Google’s TV ambitions anymore. Android TV only gained traction in the Far East where the OS is put on some cheap media players. So it is for sure not as significant as Google intended it to be. Other platforms are much more functional with better app support and for sure more mature. Just don’t make the mistake and put Android TV on par with the mobile Android. The two are worlds apart. Even Google does not seem to believe in their own platform, putting new features and services on their own Chromecast device (and even competing platforms) long before they arrive on Android TV. I have yet to find any UHD content on Google Play Movies for example. YouTube HDR has yet to arrive as well.

I got quite excited when Google first demonstrated their new home screen prior to releasing it as part of Android TV 8.0 Oreo, finally replacing the app-centric launcher with a more content-centric one, introducing what Google calls “channels”, allowing apps to promote their content via the home screen in a much more comprehensive and targeted manner compared to the single Recommendations row in previous versions of Android TV. Fast-forwarding to now, so several months after the Oreo release, it is back to business. Android TV Oreo on the Nexus Player is a mess. Not only does it lack many of the demonstrated features, navigation is also noticeably more laggy even though Oreo is actually said to be well optimized for slower processors with little RAM, finally placing limitations on what apps can do in the background... Still hardly any content provider integrates with Android TV’s enhanced features like the unified (voice) search, the Recommendations or Watch Next row or this new “channels” idea in Oreo, only providing a bare minimum WebView to browse and watch content.

Sony and Philips/TPVision, both having a rather homeopathic market share compared to Samsung and LG, are just not enough to carry the Android TV platform forward. The nVIDIA SHIELD is more of a niche product and the many cheap Chinese streaming boxes won’t help Google make a lot of money either. On the app side, still many content providers lack a native Android TV app, many others integrate much better with competing platforms. Even looking at Google’s own services on Android TV pretty much tells you the story of how significant the platform really is. So where is Android TV heading? I don’t think that it will ever be big. It might very well live on in mediocrity for some time until it finally suffers the same fate as the late Google TV.