You can cry wolf all day long about the quantity of 4K films on Amazon, but quality of resolution at low bandwidth streams is still the major differentiator here and what will ultimately (and has already) grabbed the attention of some very key people in the space...

To that point, you may or may not remember this post:
http://www.davidrfoley.com/2017/01/21/quality...k-content/

The eye doesn't lie...