Smart TV sales rose because every TV over a few hundred $ is a smart TV - whether you want it or not.
I don't know anybody who chose their last TV because it was 'smart' - or even care whether it is - but they have ended up with smart TVs anyway!
Pretty much this. It's impossible to
not get a smart TV if it's bigger than a desktop monitor. I have had "Smart" TVs for about 5 years now, and I have literally never used the apps that came with the TV except once when I first got the TV (first had a Sharp, then a Panasonic, now a current-model high-end Samsung). The apps are terrible and buggy. Sure 25% "own" a SmartTV, but I bet of them, something like 90% of them have never used the apps / didn't realize they had them, 9% have used one to five times, and 1% use regularly.
The 12% apple TV/Roku/similar is more impressive, since if people have those, they know how to use them, as they specifically purchased them.
I hope TV manufacturers start making decent OSes for their TVs soon. Everything post-1080p LCD has been pointless (although the price has been dropping too, and screen refresh can be good if you want to spend serious money). I don't get this push for 3D or 4K though. 3D: no one ever uses except for movies for their kids. 4K? our eyes can literally not distinguish from 1080p at normal sitting distances / screen sizes. Can't wait for Microsoft or Apple or
someone to step in and make a decent TV OS. I'm surprised Samsung hasn't, but they sure aren't even close.
E: I also have an Apple TV, which I use all the time now that video streaming works. I never use the apps on it either, though...