This is a feature from Screenconnect and it works pretty good.
Basically the text in your host keyboard is typed out on the remote session. Why not just copy and paste? Well, consoles, (thru SSH for example), devices with different form factors and OS, etc. might not support copy and paste and this method works perfectly on a universal scale.
It would be really useful.
Awesome feedback from Teamviewer staff. They seem really intrested in listening to their customers.
This would be quite useful - I use lastpass for password management, and it would be nifty to be able to copy and paste into login dialogs.