To my eyes, HDR is first significant improvement in television since color.Yes I'm looking forward to it. But it's not an order of magnitude improvement, which the first iPhone made. In television, as with phones, we are now seeing incremental improvements as they are maturing technologies.
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I like to get inches away from a UHD display and see that incredible resolution, but it is only an incremental improvement at a distance:
And it is about blacks and whites, ie dynamic range. Plus the color gamut.
It is totally independent of resolution.
You could watch a 640x480 movie in hdr and still see the difference.