i actually game already on a 4k monitor on my PC, have 3 290x... and actually im using 2 4k tvs in eyefinity, but there are few games i would like to play on a ps4, and i dont want to buy it with the wrong tv... Im not saying that i want to play 4k games i just want to know how do 1080p games look upscaled on a 4k tv
"Your true face... What kind of... Face is it? I wonder... The face under the mask... Is that... your true face?..." Majora's Mask
ACCOMPLISHMENTS: Winning the very first tournament in Playstation Allstars with Ginta2468. Me being Spike Ginta being Sackboy.
Point blank, you will not be losing with the twice the pixels, only winning. Colors will look deeper, contrast higher, and the sense of the immersion will coincide. You know this if you are gaming on 4K monitors. The on-board CPU of a TV that advanced are going to take care of any worry you might have regarding upscaling. They also handle 3D better because the TV can afford to sacrifice pixels without being as jarring to the eyes. You might not care about 3D but it's part of that package at this point. And how it handles 3D speaks to the refresh rate and pixel density.
On my budget I'd say, wait till 4K increases in popularity, and the tech within the units is tweaked more. But if you are planning to make the jump, I wouldn't listen to the naysayers. In fact, you can grab a Sony Bravia with the bonus of PS Now for the same price you'd drop on a Samsung. Not that it would make a big difference. But it's still worth noting.
You'll be able to sit slightly closer to a 4K TV running 1080P than a native 1080. Which is a factor since you'll be pushing the higher side of your bugdet with a 65" 4K, whereas you can find a Sony 70" 3D 1080P for $2300 or so. 4K, with firmware updates, and faster on-board engine keeps you future-proofed.
Any other factors to consider?
Edit: If you are going with Best Buy, I sincerely hope you are price-matching another store or site.
I have a sony 55in 4k tv and I haven't noticed any upscaling in games only in movies. The colour is much nicer than most tvs but actual 4k content is limited. You can really notice the upscaling on older movies; Iwatched an one of the brosnan bond movies and it blew my mind. The best way to judge is to go to the store and see the high end tvs side by side. But if you're going to spend that much money you might as well get 4k because the content is only going to increase with time .
But not actual games being in 4k. Upscaling does nothing and usually hurts game experience because of the inherent input lag for most HDTVs.
It LOOKS good. But that's it. The PS4's APU is not powerful enough to support 4k gaming. And even PC gamers have issues with running games at 4k because it requires such a massive amount of VRAM. And even with people running multiple GPUs they can barely get 30-40fps. And there isn't even a 4k monitor or TV that supports 60hz.
Save your money.