The next level of Programmable IC Modules has lead me into the LCD world. but dont get too excited, they're only black and white for now, but im workin on it!
Here is a arduino module video that I assembled as a unit that plugs directly on the board. This is not a graphics LCD, it only displays characters. it's 16 characters by two lines. The reason for using this is to visualize data that you cant see. For instance, to bring this into the automotive perspective...
Say you are possibly tuning your auto, or just want to add something just to have it. You (or I) can program this display to show any information that you want! by tapping in a reading voltages from sensors in the engine bay and elsewhere, you can have it display things like Speed, RPM, TPS value, MAF reading, EGR Vac PSI, MAP Value, the time (lol), +V reading, even the Current draw on the alternator (that's really neifty for the audio enthusiasts). Anything you heart desires!
here is a video of a text based LCD in it's simulated glory. Its not reading any values, they're sample values that i programmed it to display.
Graphics LCD SIM is done as well, but im lookin for a better camera
http://www.youtube.com/watch?v=idTxqfKeKCo