This is a bit of a necro, but the problem still exists with jumpgate, so I'm throwing in my vote. I think you really need true "multiple monitor" support for the VTT, that works with different elements on different size monitors but doesn't suffer from the limitations of popouts. I know one DM who uses an iPad and a computer, for example. And I use two different resolution monitors. I can't simply stretch the tabletop across both without losing a corner of it or part of one monitor, but if I pop out a sheet it doesn't work very well for many things, and I often need more space for sheets when I'm the DM. Another example would be putting the chat sidebar on a separate monitor, so it could be open but I could still use the full main monitor for the map. I often run big maps, with a dispersed party, for tactical outdoor combat, with obstacles and evations for my players to exploit, for example. And I often want to see a wide area with more detail than I have room for. It would also be really cool if you could have different pages open on different monitors (last night my party was split between two maps for a bit, and toggling back and forth was a pain).