So a docking station for a tablet makes sense (effectively changing the form factor back to something more traditional). Holding the thing with one hand while typing with the other really doesn't so much. I think that's ok, the context dictates how you use the device.
Apple didn't stop making Macbooks for a reason:)
I'm not considering the fact that you can plug a tablet into a hardware keyboard because if I had a tablet I certainly wouldn't want to carry a keyboard round with me just in case.
I'd rather just carry my laptop around for content creation, and use a combination of my laptop and mobile phone for content consumption.
However, this all depends on the size of the tablet. If it was laptop sized (with Fn keys to allow for slightly smaller size even), I'd probably take the keyboard over Swype, but it would really depend on where I was typing. Swype is designed to be used one handed, and would be perfect for when you can't just set your tablet down. If the keyboard would be netbook sized, I might actually take Swype over it most all of the time.
For example, a docking station in the form of a monitor stand which turns a tablet into a monitor for a traditional mouse & keyboard. Or, laptop/netbook form factors with attached keyboards (this is not a new form factor, there are already touch screen tablets of this sort).
What makes the new generation of tablets novel is not merely their particular physical characteristics today, it's the method of interaction, the simplicity of the interface, and the simplified and streamlined methods for managing applications. All of those things will still be relevant if you add a mouse and keyboard.
Did you use it to type this comment?