Settlers on Amiga used two mice for multiplayer. It was awesome.
Plugging additional mouse should give you additional cursor. Or better yet just putting another wireless mouse near given computer should give you that.
Also when you Cut something to clipboard with a mouse it should be stored inside you mouse so you can move it to another machine just by carrying mouse with you.
Could you turn your phone in such mouse?
Harder challenge:
Why multiple computers with multiple monitors can't just merge in one common space shared and split as their users see fit?
Plugging additional mouse should give you additional cursor. Or better yet just putting another wireless mouse near given computer should give you that.
Also when you Cut something to clipboard with a mouse it should be stored inside you mouse so you can move it to another machine just by carrying mouse with you.
Could you turn your phone in such mouse?
Harder challenge: Why multiple computers with multiple monitors can't just merge in one common space shared and split as their users see fit?