ssh is more than telnet access.. It's all the unix r commands (rlogin, rsh, rcp) rolled up into secure, encrypted commands (slogin, ssh, scp).. However, even more, SSH allows the ability to tunnel X11 session (and other services when configured) through the encrypted tunnel. This can allow for secure communication of virtually any service.. I've read articles on securing NFS mounts via SSH.
Albeit, command line access is probably the biggest use of SSH.. I just wanted to point out that it's MUCH more robust..