Not that the launch isn't an "explosion" of sorts.
But when Apple (and internet speeds/etc) make it viable to wirelessly tether to your computer and/or sync 100 percent to the cloud - then I could easily see a device like the iPad being in multiple places within one home.
When I say sync/etc I mean - OS upgrades OTA, managing music and movies OTA, full printing OTA, etc. Because if they can make the iPad NOT reliant on syncing to another device, then iPads could be used in cars, embedded in various places around the house as control panels/media devices, and a lot of other uses.
It's a baby right now (naturally) - but the potential IS great if the technology moves forward. I do hope that there's exponential growth with the device and not slow slow slow incremental.