Here's what you can do with an X terminal. http://www.viewtouch.com/mobile.html

The program that is putting the graphics on that display and handling the touchscreen input is running on a $195 solid state computer which is 2,500 miles away (in New York City) from the wireless tablet showing in that picture. The program is actually an X Windows System window manager which is using only 6.5 Mb or RAM and running on a 500 Mhz processor which requires no fan.

There are 8 touchscreen tablets like the one in the picture which are located all over the USA & Canada and are getting their display from that same program on that same computer in NYC. The 8 touchscreen tablets are running Midori Linux on a 128 Mb Compact Flash card and running only the X term, which is receiving the graphical display via ssh (compressed and encrypted) over the Internet.

X terms can obviously do graphical things and they can allow people to work collaboratively without regard to where they are, even if the users have no idea that they are working together.

X terms are vastly unappreciated and not understood very well even by Linux enthusiasts.