I expect social distancing to only last a month or two from when the parks open. It's all theatre at this point. The virus has been here since at least January, there's no difference opening a theme park in a month compared to last month as there's been no health developments/situation is still the same only policy's have changed.
The parks will comply with the security theatre for now to open (As we roll our eyes over the silliness of it all), especially the regional parks (Six Flags, Cedar Fair, other independent parks), but I can foresee them dropping the act quite quickly.