I'm more or less with you Will.

There's nothing available that significantly adds to what I already have - certainly not enough to cause be to part with lots of money !

OTH if either of the following was to become available I might be tempted.

Either infallibly accurate autofocus that worked at 1:1 magnification without hunting and allowed me to choose precisely (and I mean precisely) the exact part of the photo that I wanted to use as the focus point. It must also work instantaneously.

Or a hinged live view screen that could be split so that it showed the whole picture area and also a very highly magnified section of the image. The magnified section must be a section that I choose and I must have the means of choosing the section from anywhere in the picture area. Again the screen resolution must be such that I can be 100% sure of the accuracy of focus.
I'd also like an accurate and easily viewable representation of the true depth of field. I don't mean the dark screen, barely visible, stuff that we get with the traditional DoF Preview - but something really useful (and of course adjustable).

Too much to ask? Maybe but, for me, things that might make me think about a new camera.

MickLL