The worst part is that the other points you could use: DPI, resolution, touch capability... all of this exists on certain laptops now!
But, at least as far as I approach media queries, if you've triggered the mobile breakpoint (well, default CSS as mobile-first is the way we approach it), its because the desktop design we've used literally will break on a browser window that narrow.
But, at least as far as I approach media queries, if you've triggered the mobile breakpoint (well, default CSS as mobile-first is the way we approach it), its because the desktop design we've used literally will break on a browser window that narrow.