They are both the same thing. An LED Monitor and a LCD monitor work the same way. One is backlight with fluorescent and one uses LED's on the edge. I thought LED was too new and purchased a 60Hrtz 40" LCD about 2 years ago because that model was lower in price and had more HDMI ports. There seems to be a move to provide fewer HDMI ports. You might look at say 120 Hrtz, but more than that may just be fluff. That is about as fast as most video games also. However, 3D Video should require at least 240 Hrtz.
I am 57 so more resolution does not help much above 1080p. If I set further away I just have to wear glasses for distance anyway. So I just stick with 40 inch TV Sizes and sit closer.
In reality if you are not going to use 3D Video, an LCD at 60 Hz is just fine. Normal video is only about 30 frames per second. Anything faster than that and your HDTV starts using software to add frames that don't exist. In fact often people are turning options off when they fine-tune their HDTV. Often people are also adjusting down the brightness also. Turning down some of these options may increase screen life.
I expect that 4K video will be maturing and work a little better in about 2 years. It may just be overkill and too expensive. I question whether Video will be produced in 4K quality. So monitors and TV's may just be stretching the 1080p resolution causing distortions. I would just look and see how this develops.