Currently running a Samsung 55" 4k Curved off my 1080, I love it.
I will say though, this probably isn't recommended for everyone. But, I'm weird and enjoy it. The biggest con is that at 4k the television is limited to 60Hz. And, the picture is huge so, depending on viewing distance, you may have to move your head. It's not for everyone and there are now some nice 144Hz UHD monitors available that would probably be better suited for most people. And, I've ran into a few HDMI EDID issues, they seem more prevalent between televisions and GPU parings compared to monitors and GPU parings.
That said, everything looks vibrant and fantastic. I can be working on multiple things at once spread out across the 55" and not have to cross monitors.