I don't see how you have to put hunching over your laptop to use one. I use one, not as my main computer, but I can easily sit 2-3 feet away from the keyboard and still be able to see the screen perfectly fine, not to mention the fact that I have bad eyes.A removeable keyboard means you can sit back comfortably instead of hunching over the laptop to be able to type. Not to mention being further from the screen is easier on your eyes.
I don't see how you have to put hunching over your laptop to use one. I use one, not as my main computer, but I can easily sit 2-3 feet away from the keyboard and still be able to see the screen perfectly fine, not to mention the fact that I have bad eyes.