I asked this same questions what feels like years ago, and here I am again. With the advent of 4K and streaming, I find myself in the market for a new TV to compliment a re-purchase of a PS4, now that there are enough games out there I wanna play to justify owning one.
I've done a bit o' googling on my own and have come to learn that a lot of 4K TVs have bad input lag for gaming. I had an old Samsung UN46EH5000 and I have to say, I never had any issues with it. Picture quality made me happy although the blacks are not as black as they used to be, but that might just be due to me knowing more than I did back when I bought it. I could easily tell between 30 and 60 FPS, motion blur/ghosting was noticed very VERY infrequently on very stark contrasting scenes...I had nothing bad to say about it. It was a fine TV!
But now 4K is a thing, and the consoles tout their compatibility as if it's a selling feature. I've seen 4K before when I worked at Futureshop, and it's very pretty, but I can't imagine ANY games actually running at 4K on a PS4. I'm not going to buy a 4K Blu-ray player, at the most I would stream 4K if there was something available in 4K that I wanted. I don't think there's a lot of great 4K content out there that I'd be interested in.
...so should I even worry about shopping for a 4K TV? Should I just shop for a 1080p TV with low input lag and some deep blacks and forget this whole 4K thing, or is 4K, low input lag, deep blacks and a price tag around the $600CAD mark something that's actually attainable?
If you guys have any TV recommendations or any sites/lists I should check out I'd appreciate it. I'd like to spend around $600 CAD, something between 40-50 inches. Nice, dark blacks and low input lag. My previous TV served me fine.