I started experimenting with Roll20 last night as I prepare to use it for projecting maps onto the table for use with actual minis. I've read through all the relevant forum posts here, and I'm stuck with some questions. With the option of the single laptop running two instances of roll20 (1 player, 1 GM), is this as simple as just opening a second tab? Also, in this use case, is there any way to keep the players from seeing the GM tab when he switches to his tab to reveal the fog of war? Also, has anyone used an Apple TV connected to the projector to provide the player view? (for the option of using two separate computers? Finally, does the iPad app allow players to view the virtual table top, or just their character sheets?