I am personally not too excited about these "features" as each camera I own, I use because of their own personalities. When I use a Leica M (whether film or digital), I like the involvement I have with the photographic process - knobs and dials, click stops and not button clicks. The finder is uncluttered. It has the same feel as a heavy analog watch, if that makes sense.
If I want to do macro work, take a stroll with my kids, or need autofocus - the OM-D gets some use. I suppose if I shot longer tele lenses, an SLR or EVF would do better than the M9 too.
In other words, I don't mind having different cameras for different uses. I don't necessarily want my Leica M to do what a Canon/Nikon DSLR can do. I like choosing what camera will come with me when I leave the house, and doing what each camera does best, working within each camera's limitations and using each one strengths. It makes for me, a more enjoyable experience taking photographs.