Just to play devil's advocate, the writing analogy doesn't really work for me; there isn't much different between the writing I do on a computer and in a notebook (though I do love the aesthetic experience of writing in a notebook), and I tend to use digital cameras just like film cameras: I keep the screen turned off when shooting, and am as selective with my shots as I am when I am trying to conserve film. For me, the screen is there for changing settings.
I do wish Leica would make an M with dedicated hardware ISO and exposure comp knobs. That would obviate the need for a screen, for me. The M60 certainly has the former—but is there exposure comp on it?
Also, the bluetooth idea is great. A companion app would satisfy the typical digital user and the purist alike, who doesn't ever have to use it. In fact I wish all digital cameras could be used that way.