Actually, I do think that. Wouldn't it be lovely to have an image format for truly enormous images and have the browser request only the chunk currently visible? It could just be a container format with jpg's in it. Let the file system figure out that x/y means tile number 56436.

You could provide multiple image versions for zooming to get to the TB scale.

Computers are really good, performance is astonishing, no reason why we should never be able to use a TB size image. Never is a really long time.

Have epic panoramas, detailed scans from paintings, extremely easy game design and maps that just work.