Thats kind of a plastering over of the reality though.
iOS plays nice with ActiveSync, right there thats Apple accommodating enterprise needs. I can hit up exchange to remote wipe any employee's iPhone right now.
Its not that IT departments are forced to accommodate iPhones, they're forced to accommodate yet another smartphone.
Consumers want to access their company email on their personal property. The inclusion of ActiveSync wasn't to help enterprise IT departments, it was the help the consumer access the resources they want to access.
That said, there are other features of iOS that do support your point of view.
i'd not say "consumerization of the enterprise" is limited to the last 10 years - it is more like for the last almost 30 years "large IT depts have been forced to accommodate" PC, notebooks, iPhones, iPads ... (mental implants? ask Jobs what is the next :)
What we've seen over the last 10 years or so is the increased consumerization of the enterprise. Essentially, large IT depts have been forced to accommodate iPhones and iPads, due to large numbers of people buying them then saying "I want to use this at work", rather than Apple having to accomodate "enterprise" needs (and thereby perpetuating often antiquated or just poor ways of doing things).
I'm generalizing here a bit, but that's another way I'd read it. It probably would have been difficult for people in the late 90s to foresee how much consumerization of IT we'd see 10-15 years in the future