Of all the television sets I have owned since 1985, the native tuner included inside the device has been used maybe 2% of the time. The only advantage I have ever seen from buying a display screen as a television set is that it comes with speakers loud enough to hear from across a large room, and has as many as six different input ports. None of the screens I now own currently decode their own NTSC/ATSC/QAM signals.
My first "smart" TV was also my last, because LG made it obsolete within months of me buying it. Now it also functions only as a dumb screen, and is not allowed on my home network. Never again.
You don't need a smart television now. You don't even need a television. You need a monitor with HDMI inputs and speakers.
And if you want a DisplayPort input in lieu of one of the HDMI sockets, that seems to add at least $30 to an otherwise identical monitor, even though DisplayPort is royalty-free. There does seem to be an attempt to segment the market to charge more for displays connected to a computer than for displays connected to a home entertainment appliance.
At larger sizes, I think the assumption is that if you don't have a TV tuner, you're attaching it to a computer, and if you do, you're not. And that breaks down at smaller sizes, where resolution and pixel pitch become an issue for computing, but less so for consoles and DVD players.
I haven't done much digging on this, since 40" is plenty for the longest line-of-sight possible in my house.
I'm using an NEC E-series 55" commercial display as my TV and gaming monitor. It's not a great TV, but it is solid and it's way better than the one it replaced.
If it's never connected to the network....