Fanboy silliness.
Now here we get into one of my personal favorites that did not make the list: the Thrive.
You don't need any extra dongles that you are likely to use, you can just plug straight into the device itself. It's large enough that it can easily accommodate a real USB port and an HDMI port.
Why buy an inferior product you know you will have to buy extras for?
Having actually "been there and done that", I will say that an Apple dongle is a relatively expensive proprietary part that's easily lost and less easily replaced.
You are far better of beefing up the storage in your cameras as they were likely built without the Apple groupthink mindset and can actually be expanded. Fortunately, not everyone thinks it's folly to be able to upgrade an appliance as storage technology improves.
It is good that Apple makes neither video nor still cameras.