I've been looking for software to provide this feature for ages!

I'd like to see this addition to multiplicity, so that the secondary screen I have attached to my laptop can be used to browse the internet by my family and friends, while I continue using the main screen. (I don't have the money or the space to buy a second computer)

It would be a much cheaper solution for low-resource operations, such as web browsing, than having to get multiple computers. Three users at three screens of one computer could easily pass work from one to the other.

This may also be useful for cooperative gaming (although I don't know how many games would support multiple mouse focus.)

I realise the problem exists of having to link together each keyboard with it's own mouse (as each user of the computer would want their keyboard to respond only at the focus of their own cursor)

Failing this, an addition to multiplicity whereby each computer is controlled by its own mouse and keyboard, but where users can copy/paste/drag-drop/etc by moving their cursor off of their own computer, and onto their neighbour(s), as currently one user can do with multiplicity. This addition would allow for, say, three users to control three machines at once, each using their own machine as a primary, but easily being able to pass files, information and assistance, simply by moving their mouse off the side of their own screen (and beyond). Could be very powerful in the workplace, yes?

Some cool software you guys are chucking out! Good work!