Control your windows PC over your webos phone.
This was a really neat system. It had a server that ran on your computer, it would cut up the screen into segments and relay only the ones that changed to the app running on your phone.
The webos phone only could use javascript, so there needed to be some clever tricks to make this functional. It pretty much was a webpage running on your phone with only certain images updating as things changed on your computer. It did the update fast enough that it felt like you were directly controlling the computer over the phone.