What is GIS? Well, it's a of digital mapping technology that can collect information with the click of a button. It's currently a small sector but is growing fast and will be used in many more projects around the world. I'm currently working in this field, specifically in the data management/organization sector, and find the work very fascinating!
If you want to learn more about this growing field visit the Esri website, here, for more information. GIS technology can be used just about anywhere for just about anything, and you'll find in a few years there will be much more emphasis on this field through schooling and work environments.
Until then, us GIS people will celebrate this day with cake and pizza!