The BrickFest Live giant mosaic uses 4x4 plates instead of 2x2 bricks. They have baseplates with 2x plate strips glued on, so when the 4x4 plates are placed by the kids, there is a 1 plate high channel between the baseplate and the mosaic plates. To debrick, they use metal rods, slip them in the channels, and pop the plates off. They can clear the mosaic and reset in about an hour.
10 years in, Jamie's got to be thinking "what does modular town still need?" - Police Station/Donut Shop - Car Dealership/Gas Station - Hospital - Toy Store (Lego Store) - Home Improvement Store - Grocery Store (full size, not just the "greens")
Given that the trend is multi-use buildings, I think a combo option is most likely. As much as I'd like to see a dedicated 32x32 build for any of those as singles, I don't think it will happen.