Sure, but what we're talking about here is really MASS storage, like being away on an extended trip. I took film on my last trip because it was not economically feasible to store mass 5MP+ images digitally without a laptop. These new devices change that. Besides, you might want to save your camera battery for shooting, not image management.

Occasional point-and-shoot people with 3MP cameras should be real happy with a few memory cards, but if you need to shoot the digital equivalent of many rolls of film in a short time period, you gotta have one of these massive hard drives.