drhowarddrfine - 5:17 am on Feb 1, 2013 (gmt 0)
It's not the nature of the site, or the device, but the content. Maxing out a site at 800px doesn't make sense if you have a blog with 14px text. If you want to properly set a paragraph, you want to keep it to 2-3 alphabets wide which, in most cases, works out to 640px max. but what if you have two columns? Or two images intead? What if your user is on a phone and switches to his desktop or his iPad?
What we do is not look at the width of the page but the width of the content. One site we just finished looks pretty good with the same content on the phone but you can switch to a Mac 27-inch monitor full width and it still looks like it was designed that way. But our content allowed us to do that and not all web sites have that flexibility.
Not once do we say, how wide is the screen when we do this. We always say, how wide can we make this paragraph or image before its maxed out or we slide something else in (or out).
I could go on and on but it's a lot more work than simple sites of the past.