Photoshop and Illustrator are definitely “page” based, but Sketch? I see the correlation of page to artboard, but all the settings are definitely “screen” based down to resolution and pixel density. Every aspect of Sketch’s UI is screen focused even down to the default artboard sizes.
Maybe you mean something more dynamic when you are referring to “screen”? Although, even then, we have the ability to use symbols and dynamic resizing to accommodate.