The 3D will have eye-controlled focus and a blink-activated shutter. You heard it here first.
You joke, but I like the eye controlled focus of my Elan 7e. I don't know if the technology is accurate enough to select and individual AF point in a 61pt grid, but if it's close it would be awesome.
5D Mk III, Elan 7e, Fuji X-E1, some old rangefinders
Tamron 24-70 2.8 VC, Canon 70-200 f/2.8L IS II, 400mm f/2.8L II, 100mm L IS Macro, Sigma 85mm, 50mm, & 35mm f/1.4's, Rokinon 14mm f/2.8, Canon 2x Extender II, Kenko 1.4x, 430 EX II, Elinchroms