Unfortunately I don't have Netflix in this particular lg tv so I can't try it.
Using my ps3 for Netflix.
Tried playing 4k videos through the tvs usb. Very very good pic quality. You'll know right away that it's better than full HD. Now my full HD movies, looks Good also. Although looks the same lang as like.playing in normal full HD tvs. So I don't know if the upscalling works.
The thing is playing 4k 60fps seem to be not working. That's why I got a minix.
Overall, I'm happy. I wouldnt know the difference between a true 4k and a fake 4k. All I know is this, when I play a 4k media, pic quality is way better than playing a full HD movies. But when I play a full HD movie, it's the same lang as playing it in other full HD TV. So upscalling is not that good