This is a total About Phuquing Time moment, but significant even so.
http://gigaom.com/apple/screen-sharing-in-os-x-lion-allows-multi-user-sessions/FINALLY OS-X will allow users to log into accounts behind the front-facing account. This means that a user can be at the machine with another user logging in behind it to another GUI, bringing it up to speed with any *nix flavor or even Windows. OS-X has always had it so that a remote-logger-in was looking at the main window. Of course any number of people could SSH in, but that's really pretty useless. This is of primary importance to me and my 'pad: having 6 monitors on my desktop, then logging into the front-facing interface COMPLETELY RFs my desktop layout to satisfy the tiny real estate of the 'pad. This new capability will make it so that, just like any other system, the GUI will adapt to the size and capability of the receiving device.
This also opens the door to the notion of remote use of OS-X ie., terminal services or perhaps even a VMWare solution (not because this does any of that, but because they're getting less uncomfortable about presenting the OS-X interface on devices that are not Apple manufactured)
