While one can always try to see if their "Smart TV" can actually run a streaming client app like Moonlight with adequate performance, it's so hit-and-miss I just assume I'll have to plug in a ~$50 Android TV streaming stick via an HDMI input. I've used the 'Google Chromecast with Google TV' and 'Amazon Fire TV Stick 4k 2nd gen' and was able to sideload the open source Moonlight client app to stream 4K HDR10+ / 60fps from my server PC at 80 to 100Mbps.
It's not necessarily the CPU power, it's just that most of these TVs have wildly varying throughput from crufty driver stacks. The manufacturers don't seem to test them beyond the ability to receive ~25Mbps streams in the usual streaming apps. As long as it does that, they don't care to make it work to the rated speeds the hardware should be capable of. So maybe it has higher throughput, maybe it doesn't. And there's no guarantee what the throughput will be after the next firmware update. Since I want to do game streaming and also have UHD rips that can go up to ~100Mbps, I now just always use 'Smart TV's in dumb mode and run content from an external device.