I don't think iTunes is that simple to use. It's very easy to make a mistake and lose all your contacts. I know two people that happened to, and to be honest I cross my fingers and hope when I upgrade my iPhone. Dropbox is very easy to understand in comparison.
Dropbox is a lot different, though, when you think about it's core concept. Dropbox doesn't do anything that necessarily is novel. Dropbox allows your computer to function as it should--documents should be backed up, safe, and widely accessible. Dropbox merely supplants the role of redundant hard-drive backups and e-mail file transfer. But we've lived with e-mail and file systems for long before the creation of Dropbox. Dropbox is easy to understand because it hasn't added something new, it just helped us live our digital lives with convenience.
iCloud shouldn't be easy to understand because it's introducing an entirely novel concept to our digital lives, which is to lift the burden of wires and a fixed connection off consumers. This is a genuine step forward in the movement to unleash our digital lives. It's a totally novel concept so it should be difficult to understand than services like Dropbox.
I would really hope that Dropbox doesn't supplant the role of traditional off-line backups. What's the point of having your data backed up to a web service that can go offline, both temporarily and permanently? Off-line hard drive backups are also cheaper, since you aren't paying a recurring fee for the hardware and your drive is likely to last several years.
What's with the downvotes? This is a fact. If you set up a mail provider as Exchange they have the ability to wipe your phone. Google is a big place so while it's unlikely this would happen, it's not impossible. I prefer for it to be impossible.
