So, you can fire back a large number of xterm's to your
local display. These are all shells on a work machine
where you can do a multitude of different text-based
things (work with & edit files, read mail, etc).

You can also send back Xclients, e.g a mail reader

If your connection is fast, even large apps like
Xemacs can have OK performance.

Remote Netscapes will likely always be a bad idea
(but see VNC discussion near the end)