[whatwg] RWD Heaven: if browsers reported device capabilities in a request header

[Irakli Nadareishvili]

Many thanks to everybody who has responded and for a lively and a productive discussion! 

Quick clarification: the proposal is to include *device* capabilities in the HTTP headers, so when we say "screen width and height" we mean device screen width and height which is constant (but can have multiple values: for portrait and landscape). 

There's no proposal or even need to capture user resizing a window and consequent change in viewport size. That is a completely different discussion.

Thank you

Irakli