Digital photography

I mean something like this:

or this:

These are two concepts that are around already, there is totally a market for it. A prime example would be me, a pro photographer who has old film cameras he loves but never uses because his need to use digital for his workflow, this would give those old camera a new lease of life. Also it would enable you to take digital shots using a "knackered" old looking camera (arbeit with a quality old lens), into situations where you would rather not take all your expensive new looking kit that is likely to get stolen or broken.

If the digital adaptor costs the same as a roll of film then fine, it's more realistic though that the cost would be comparable to at least something like my NEX3 in which case, the argument about kit being stolen or broken is void.

You also mention about about not being able to have the screeen? The screen is not the main benifit of digital. A) no-body needs a screen, and b) if you are using a film camera anyway you are used to not having one.

No, nobody does need a screen but probably about 99% of the current camera buying market really really want one.

Lets say that something like that costs even as little as £200 - and I'd imagine that in the first several years of production at least you could add another zero onto the end of that - I can buy a roll of film and have it devved and scanned for right around £6 so I could buy a digital adaptor or spread that cost out over the 33 rolls of film, I know which I'd choose.