I thought this was possible, but can't find anything about it.

I would love if you could choose to have a certain dashboard be the default displayed based on if your device is mobile/desktop (or landscape/portrait).

My use case is that my default dashboard looks great layout-wise on my desktop browser (a nice uniform rectangle), but on my phone it results in some of the widgets I want to see first showing up at the bottom of the page, below some of the ones I don't look at as often. If I could set a different dashboard as default, I could make a mobile version of my dashboard and get the best of both worlds.