Consumers only buy new TVs every once in a while, largely due to the price, I'd say. TVs are getting so cheap, I'm even surprised how cheap 4KTVs already are. Next year Samsung, SONY, etc., are releasing TVs with Android TV built-in. There would be no reason to price an Android TV higher than their own OS-based TVs, in fact it would probably be cheaper to sell an Android TV than to pay their own development team to build their OS and make updates. Sure they'll have to pay a couple bucks in royalties to Microsoft like everyone does (I assume), but if you're getting the OS essentially for free then why not go with it? Especially since Android TV is also a gaming platform, and can cast anything from your phone, be controlled with a watch or phone or tablet it just makes sense and would be a huge selling point for any new TV. Google TV failed because it sucked, no one was making apps for it, and it was expensive. Google TV = current version of Android. Control issues aside, an Android app is an Android TV app.
I've been on the fence for getting a new TV for a few months now, but I'm definitely going to hold out for a 4K Android TV now.