The upscaling process on some televisions is astounding. Upscaling a 1080p@24 source to 4K@120 display brings out so much detail and gives the content an entirely different feel.
http://www.rtings.com/tv/reviews/vizio/p-series-2016 has a 120hz panel but at 4K the "120hz" is interpolated; it's not actually getting 120 updates per second from the source (I wish). I have this exact TV as a monitor and 1080p gaming @120hz is glorious. 60hz is fine for desktop use but now that I've tasted it I can't go back.
It's not just linear interpolation, there's all sorts of clever edge detection going on as well. It still cannot invent detail out of thin air of course, but based on the type of contents it can infer the detail that "could have been there". YMMV though, I hate it just as much as motion compensation.
