Since the programs are printed out and stored in filing cabinets, it'd be too bad if something cool happening at one Dynamicland instance couldn't be easily shared with another instance somewhere else. We know that computing would be better if it was shared in a physical space with real-world social circles. But not everybody has those: some people are disabled, or rural, or outcasts. The same issue comes up with experiments with local meshes and P2P gossip for new social networks.
Not as many people meet strangers in chat rooms or games these days, but it'd be sad if the baby of connecting people anywhere was thrown out with the bathwater of big social panopticons and glass screen prisons.