49 inches of 4K goodness for $640 (in China though, so this might never appear in the West). Built-in Android as a freebie extra.
What's strange to me is there's NO mention anywhere of using this thing as a desktop monitor. OK it might not be for everyone but really? No Linux hacker wants all this borderless screen real estate?
49" is about the optimal size - each HD quarter screen is ~ 24", and we've been happy with that pixel density for years. From experience, the height of the screen would feel a bit wierd (you'd definitely scrap the little legs), but you might not want to make the screen wider on your desk without curving it.