The Samsung JU6700 4k LED TV has the same picture quality as the cheaper JU6500, but the screen is curved and it comes with a better remote. It's a good UHD TV, but it has a few flaws.
Unless you care about the curve or the fancy remote, get the cheaper JU6500 UHD TV instead of this Samsung JU6700. The picture quality is the same. It is good, but it does have a little bit of motion blur and judder.
The contrast ratio is good, but nothing spectacular.
This TV doesn't maintain its colors well when viewed at an angle. The curve of the screen exacerbates this issue, because the side nearer to you is at a greater angler than it would be on a flat screen.
Update 01/06/2017: We have changed the methodology of testing. Since this is an old TV which we don't have anymore, we extrapolated the results from 2016 TVs.
Like the JU6500, there is a small constant judder when watching movies. You can get rid of it by turning on 'Auto Motion Plus', but it adds the soap opera effect.
In game mode, the input lag is low. PC mode (for 4:4:4 support), is a bit higher, at 44.2ms.
To enable chroma 4:4:4 at 60Hz, turn on 'UHD Color'.
Major Apps Available
The app selection on Samsung's new Tizen OS is better than it was at the start of the year, and it comes with a full web browser. Overall, a good smart platform.
Contrary to the JU6500, the JU6700 comes with a fancy smart remote, which is great for browsing the web.