> It depends on the program and context. If you select an image in a browser I wouldn't copy the image. But if it's an image editing program, I would.
This does happen currently though (I tested it earlier today).
> But copying it into a hundred formats isn't something you should do for every selection of any random thing (or ever, but if you do...).
I changed that aspect of the proposal in a previous comment - in the new version a file containing a single mime type (with a well-known magic number) is saved to disk. To handle conversions, a (large) set of filters is installed on the system, and the application reading the clipboard must iterate through the installed filters to find ones which convert the file to a format it can use. This is roughly what BeOS did, which apparently worked well (or so I am told by a colleague who developed for BeOS).