I have a 2015 Sony Android TV (XBR49X830C) and, honestly, its "smart" features have been abysmal. I really liked Android TV on my Nexus Player and when trying out a Shield, but not the built-in system. The UI lags like crazy and it's wildly unstable with frequent kernel panics and reboots, especially since the Marshmallow update, that I can't even diagnose because I can't read its kernel logs without root, and factory resets haven't helped. Its built-in Cast Receiver is also way buggier than a standalone Chromecast.
I have some interest in getting a newer TV in the not-too-distant future because I want full array local dimming, HDR, and a bigger panel, but I'd rather stick to built-in smarts because HDMI ports are at a premium to me between multiple Nintendo and Sony game consoles, speakers, and a (non-DRM-compatible) HTPC while every switcher I've tried has CEC issues.
Have Android TV sets improved since 2015 on this front, and is there any indication they might improve much next year? Are there any sources that actually list the "smarts" specs for comparing different TV sets in the product lineup? My XBR49X830C for example has a MT5890 SoC with 2 ARMv7 cores, 1.5GB RAM, and 8GB /data partition. I'm not as interested in stuff like games as just having streaming apps that actually work.
It's significantly better but only on the two super high end models that came out a month or two ago. Super fast soc with 4 gigs of RAM I believe.
If you want a mid ranger you are going to have to wait.