Ok, this is going to be just my personal opinion again, but I think Roku is so far ahead of everyone else I'm not sure why would anyone need a different platform. Roku is either built in or comes as a $20-50 add on. So far the shortest a device has been supported with always getting newest updates was 7 years for the first generation players - all others are still supported. You get all streaming apps and the experience is just far simpler, smoother and reliable than with any other platforms I've tried, and there's no bloat or annoying ads. I personally really don't like Android TV - I think it's just incomparable to Roku in terms of user experience, performance, support, and value.
I personally haven't had a chance to try Apple TV, but I can't imagine getting a $200 set-top box to have a similar experience at best to what Roku delivers built-in or in form of a tiny $30 streaming stick unless Apple caught you in their ecosystem and you're paying the price of it to also have it on your TV.
Imho Roku just does everything perfectly and I can't imagine anything that could be done better as a Smart TV platform. Oh and to answer your question about market share, or usage to be more specific (as of last year):
I personally haven't had a chance to try Apple TV, but I can't imagine getting a $200 set-top box to have a similar experience at best to what Roku delivers built-in or in form of a tiny $30 streaming stick unless Apple caught you in their ecosystem and you're paying the price of it to also have it on your TV.
Imho Roku just does everything perfectly and I can't imagine anything that could be done better as a Smart TV platform. Oh and to answer your question about market share, or usage to be more specific (as of last year):
So let's assume that "value" is important in getting a TV but not the #1 priority. Meaning TCL would be something you and I would get in our budget range when looking for value, but maybe not someone like my dad. Although you may be able to swing an OLED of your choosing, I don't know, despite the drawbacks of OLED tech. Would you go with the flagship Sony or the flagship Samsung QLEDs?
My dad is serious about getting a TV this time. Last time he was throwing the idea out there because our current Sharp was randomly shutting off until we unplugged it and plugged it back in; turned out my sister had her Switch plugged in to the surge protector. Along with the TV, the Dish DVR, two lamps, the Nexus Player, and our air purifier. I don't know how someone let it happen, but it did lol.
Anyway, he wants a slimline TV that would go flush with the wall when mounted. I really don't want to steer him towards OLED screens because I know he watches a lot of news and a lot of comedy shows, with the former having a lot of static images/tickers and the latter probably not benefiting from "true blacks." I don't want him asking me about burn-in images after a few years and I'll eventually bring it up to him if he starts to gravitate towards an OLED panel.
The pricing of a Sony X950 85" isn't too far off from a 65" C9 or even the newer CX. I figured I'd hype up the larger screen size of the 85" Sony over the 65" LG OLED to try and sway him some more.
If he insists on the absolute latest tech, I'll let him go the OLED route. It's his money and he has always been an "overkill" kind of guy when it comes to tech and some times we're actually grateful for it in the long run. But the difference in performance and value between a Samsung Q90/Sony X950 is probably greater than a Sony or LG OLED, especially since the sales pricing nets a larger panel for relative chump change. Just a few hundred on a $2K+ TV.
If he goes OLED, the slimline TV would be the LG E9 and God forbid he looks in its $3K+ direction. I think the 85" Sony X950 is about $2400? I'll have to look at Best Buy again, but that had the lowest price I'd seen for a brand new set, and not open-box.
So I've done my own research using various sites. Reputable tech review sites, like RTings. I've also looked at Consumer Reports and The Wirecutter as well as gone through many SlickDeal thread comments whenever a deal pops up for TVs. Still stuck in the air when it comes to LED TVs and deciding between the Samsung and Sony flagship LED TVs. For OLED, if we go that route, I think it's accepted the Sonys have better image processing but also cost a few hundred more than a similar sized LG model. That's probably a different discussion.