I'm not too sure about voice recognition (imagine an event with dozens of photographers in a small space, all yelling at their cameras, or even a tranquil landscape scene, with one snapper), and the idea of having to buy, and lug about, an iPad, has limited appeal. But I guess if those are options, I can chose to ignore them.
Auto ETTR would be truly useful, though I'm not quite so sure about the touch screen zone system. I'm not much of a fan of touch screens, they tend to lack tactile feedback and get smeared with fingerprints and hard to read, but it could be useful - though I tend to prefer to do the tonal mapping in the considered conditions of post processing, rather than in the field. I think I'd have to use it for a year before I knew if I'd love it or hate it!
Live view focus marking would be great - true DoF preview! However, what I'd really like to see is auto hyperfocal focussing with aperture priority, perhaps with user selected circle of confusion size, and display of near in focus distance. A related idea is set AF points on the desired near and far points of the scene (I believe Canon used to offer this, not sure if it's on any current model), but sometimes that wouldn't quite do what you need in the real world, e.g. you want the maximum DoF before diffraction, but don't mind some of the foreground being a little soft).
Looks like there's quite a wide range of feeling about the ideas, with most of them having some people in favour, and some against.