Still not convinced

[42041]

I assume Sony knows what they're talking about, but I don't really see why HDR would exacerbate grain...

And HDR is, at least in principle, not a gimmick. If you're a photographer, you probably know that trying to capture how a contrasty scene looks to the eye can be a constant source of frustration. Your eye has no problem seeing, for example, both the unlit interior of a house and the sunny day outside, but on a regular display, reproducing this requires you to do heavy-duty contrast flattening. An HDR display and signal path would let you produce an image that plays much better to your eye's logarithmic response to light.