this looks like one of those random products that I actually would throw large sums of money at to buy.
Developing film in the closet these days is so damn expensive. You could probably pay off the adapter in about 20 real development cycles, assuming you are constantly buying chemicals at a single price.
...and the micro-engineering and their associated technology is enough advanced to tackle a product like that since a year or two... so, if we assuming a delay between 2-3 years to move processes from laboratories to factories, maybe it would be something fully doable into the range of a year or two.
So, it seems it is mostly one of this things for some brave CEO willing to break some walls around...
Yeah, if it would be available... let's say, even at the same final cost than an average DSLR, I would buy it too for a mix of reasons even when I've already fully migrated to digital... and judging for Google Searchs, it seems I'm not the only one, and there are lots of guys willing to buy same thing.
It would be a decent and worthy outcome for all those "large natural deposits" of traditional 35mm gear around the planet. If you owned, used, and abused some of these real cameras you'll now what I mean. Some inestimable legacy from very clever and bold minds is already risking to end-up beeing just a case for collectors and museums, and most of those accesories, cameras, and lenses would last another hundreed years!
And no one would stop buying bleeding edge brand-new digital cameras. Even between non-aficionados and//or non-professional people, I think most people has more than one digital camera in your houses... same as happens with cell phones and other gadgets... so, nobody looses.
Well, let's see whats brings the future for us... I'm very optimistic about such a development, because it would be cool, ecological, and all the rest...