UI Phone Home

Aza recently posted about the problem with the home button on many modern touch devices. I empathize with the problem he mentions as I oftentimes find myself nervously hitting the home button when trying to get to the root of my current mental context (which is the application).

However, I can’t say I agree with his proposed solution (and it seems many of the commenters on his post have the same issue with it that I do). The camera model, for me at least, doesn’t really work because I actually find the autofocus button on modern camera’s to be mentally …