Not sure how they are going to solve the pixel density issue without going to interactive displays, which would be a mistake.
Malls trialed interactive maps sometime in the last decade and it was a worse experience. One print map can service a lot of people crowded around it. Make the interface interactive and suddenly it's only usable by one person at a time despite being just as large as the old print map.
The right solution, if you want interactivity, is perhaps a handful of interactive map kiosks that are much smaller and meant for one user at a time. You could fit at least 4 of them in the space of any existing giant print map.
Malls trialed interactive maps sometime in the last decade and it was a worse experience. One print map can service a lot of people crowded around it. Make the interface interactive and suddenly it's only usable by one person at a time despite being just as large as the old print map.
The right solution, if you want interactivity, is perhaps a handful of interactive map kiosks that are much smaller and meant for one user at a time. You could fit at least 4 of them in the space of any existing giant print map.