4k drives: benefits and models?

[Peter Grandi]

> - what are the benefits of these new drives? Speed, temperature,
>   reliability?

It is purely higher density. A longer physical sector means less
percentage of the disk is "wasted" on metadata. This benefits
the manufacturer mostly, so they can claim more capacity with
less cost (but more credibly than the far more slimy trick of
LCD manufacturers who are going to ever more extreme landscape
ratios to claim a longer diagonal with less pixels).