Smart TVs are everywhere today, and you have to go out of your way to buy a TV that doesn't have some sort of smart capabilities built in. That's not a bad thing by any means, but don't convince yourself that all of these TVs are created equal. You have to be aware of many differences, like resolution, refresh rate, and even what type of panel your TV has.
Don't sleep on the importance of HDR
Not all HDR is good HDR
I have a large collection of 4K Blu-rays, all equipped with HDR or a version of it with Dolby Vision. I went through a lot of trouble getting a good setup, and while I can still make improvements, I'm happy with what I have at the moment. My Sony Bravia X90J is a bit older now, but it more than gets the job done. Interestingly enough, I bought this TV just so I could get the best experience with my PS5 and Xbox Series X, and it came at I time when I didn't particularly know about or value HDR like I do now.
My living room TV is directly across from a window, and that means I can see some nasty glare sometimes. Having good HDR is nice because it means I can watch TV during the day. I'm lucky that my TV has two options for Dolby Vision -- Bright and Dark. The Bright setting is for people with less-than-ideal lighting, and it's very handy when the sun's up during the day.
On the other end of the spectrum, there are a lot of TVs that have HDR, but it's just not very good. Your colors often look inaccurate or washed out, so even though you can use HDR, it's not a great look. My computer monitor has this issue, and I often play my games without HDR on at all.
How to make sure you're getting good HDR
Do your research before buying
It can be difficult to know if the TV you're buying has good HDR implementation, even if you see it running right before your eyes. It often feels like those TVs you see at big box stores demoing the picture don't often give you the full picture, so more research is needed.
Typically, I look up reviews from names that I trust. For example, the team at RTINGS does a good job letting you know all about a TV's HDR implementation. You can often know you're getting something good as you start climbing the price ladder, too. I can't think of many OLED TVs that have bad HDR implementation, and people worry far more about potential screen burn-in than anything.
Now, you can't rely on this method if you're buying a TV that just came out, and reviews are few and far between. In that case, my advice would be to stick with the brand names you trust or just be a little more patient. All I know is that if I see a TV and it has Dolby Vision -- soon to be Dolby Vision 2 -- capabilities, chances are good the HDR implementation is a good one.