how long we will have to wait to have Samsung and LG with AndroidTV? I am amazed by the possibilities that new TV PANELS are bringing to Android-TV OS; take a look at CES2017 LG Wallpaper edition, you can throw away the "media-box" that is connected to by a flat-cable and connect a Android-TV BOX into it, that handles channels, sound, multiple HDMI input and everything else, Samsung also releasing a TV that has fiber-optics connected "media-box" outside the television, so in theory it can be "upgradable" to a Android-TV OS.
LG has webOS which is largely considered to be the best TV smart OS, so I doubt they'll drop it any time soon.
Samsung has been building out Tizen pretty heavily, especially for home appliances. Doubt they'll drop it.