I've done this ONCE before, as an experiment (and probably never again, but not because of roll20) Micro Projector propped up from a overhead ceiling fan fixture and "client" Surface Pro 2 connected over a MS Wireless Display Adapter and a bluetooth mouse. My other bigger laptop connected as the GM to control the game. The cabling for the projector was the pain-point, involving daisy-chained powerstrips and an unfortunate amount of duct tape.(fan fixture was never quite the same again... imbalanced blades). The table surface was already white and worked well enough for the projector, albeit a little too shiny. The Bluetooth mouse got passed around like a baton to whomever turn it is. This was just a one-shot dungeon crawl, so they're basically in initiative the entire time and was very orderly. (players rolled dice, so no macros were in play for them, just the GM stuff) It worked well enough. We didn't use physical tokens, as it'd be a hassle updating the Roll20 tokens to match them. All said and done, my players mentioned they missed having physical mini's, but the map interface was really cool. From my perspective, it was a hell of a lot of work compared to a usual game where I just draw on a battlemap... other than having nice maps, it didn't really add much to my game. *** With an LCD screen and physical mini's I think, for myself, I would forgo Roll20 miniatures icons all-together and just use it for the map interface. Otherwise you'd have to keep updating the digital mini's to match the physical. I DO know that i would be nervously preoccupied with the LCD getting spilled on or scratched the entire time. If you have a way to soda-proof not just the screen but the casing and cables, you really should.
