Originally posted by eddie1960 the Interchangeable finder idea is practical though (look at the LX system, or the nikon and Canon Film cameras with it. It's not just a WL that you get when you do this design, it's also huge sports finders angled finders.....
Update it for the digital age, while mirroring the design elements and an LX is most definitely something different - image stolen from Flickr member ebelbeb
this only shows a couple of the options there were also prisms without flash mount WL .....
Lovely, aren't they, but I was talking about a waist-level finder, not an interchangeable eye-level finder. Nonetheless, that's another system that would offer a difference.
However, anyone who's used a Hasselblad or Mamiya or the like with a waist-level finder will know how nice it is to be able to frame your image in that way, once you get used to the image being reversed. My little thought bubble gets the image the right way round and a useful size.
As for the vertical grip, I have one for my K2DMD (which I've had since 1981), but I have to admit I found it a bit odd to use so it usually stayed home. Of course, the base unit offered controls, too, but the batteries were in the handle so power came through a cable between them. Reviving this sort of grip could offer another difference, I agree.