I would like to have an option to let a look up pop open in full screen in the Windows GUI. either with maybe a checkbox or in screen types.

One of the use cases for this would be. When you would use a look up while adding a row in a table and would like to have a big overview of, for example, your products. This would be needed if your products would have minor differences from other each other and you would have to look at a big description.