It does if you know what you need for a device to be of the enterprise caliber, which is not just about applications, but also centralized management and distribution. The impresion I get from you and the other responders indicate is that individuals in your organizations each use it in whatever capacity they personally figure out, and in such a fashion you call it an enterprise device. When Mozilla says that that Firefox isn't an enterprise solution, they aren't saying nobody can use it in their office. They're saying don't be surprised when it doesn't play nice with your web apps and internet security.
At our workplace of 5,000 odd users, we can't use an iPad for most of our applications, because they're managed and are part of a custom image. Even if they're web apps, they require IE. There's stuff that requires secure access. There's icons that have to be applied to desktops. They need virtual apps streamed to them. They might even need to have their device re-imaged on the fly. The list goes on.
In short, like I said, you can use your iWork for fairly generic productivity, but the iOS is a very personal experience.
Is there a way that standardization and security are enforced? Or is it that each of them uses it as they see fit?
As you say, it's not a replacement for a PC. More like something that's highly convenient to carry about, and be sync'ed with, say, Outlook. Handy, to be sure, but I'm talking about a solution that's tightly integrated with enterprise practices.
I see what you're saying about Enterprise Practices, though that definition varies from company to company.
Its really a matter of how far IT exercises control over the end users desktops. In some companies, that is very rigidly controlled, and thus I can see why such a company would want to exercise the same control over mobile devices.
In other comanies, IT standards might cover a password strength policy and a standard issue anti-virus and a deployment mechanism for the standard Office apps.
After that, each employee's job function might vary so much that rigid control interferes with departmental productivity.
In other highly saavy tech companies (like the one I used to work for located in Northwest Houston), IT might have control of the peon computers of generic office workers. But those were the minority. It's hard to enforce a standard when 80% of the employees know how to build their own machine, bypass corporate NT group policies and install all the software they need off the corporate file shares.
Ironically enough, Enterprise Practices really spells "Walled Garden" that I see bandied about as an invective against the Apple model.
As to enabling IT control of iPads and other such devices, that too is ironic. The PC changed the game by removing control from IT and their centralized computing MainFrames and enabling users to do stuff on their own.
IT has since tricked users into giving up that power by invoking Enterprise Practices, Cloud Computing, Citrix and Terminal server models, etc.
So users now bring in their own iPads and tablets. Because they let users find their own tools to solve the business problems they want.
Bear in mind, user control of their own personal machine was seldom about having the ability to write your own program or modify secret settings under /etc/somefile.conf in a cryptic format. The most transformative application when the PC came out was the spreadsheet. Giving the end user the ability to run his own reports and what-if scenarioes without needing a new custom report job, waiting in the job queue, having an IT chargeback.
The solution for businesses lies within installing and securing their CUSTOM apps or access points to corporate resources, rather than taking full control of the device itself. Not that there isn't a use for that as well, I find buying a bunch of employees a $500 iPad and then locking it down so it only runs 2 pre-installed apps is kind of a waste of money and a bit of an insult to your employees intelligence beyond the grunt labor force who aren't intelligent enough to use the iPad beyond the Corporate Job Function app that it came pre-installed with and you trained them for a week on.